As an (acoustics) engineer, and a generally curious individual, I seriously appreciate the diversity, depth, and quality of this channels content. While some of the comments pointed out some of the 'flaws' in this video, I think that they are not so important in the big picture. The reason this channel is so great is because they show the experimental thinking behind a creative individual. Thank you tech ingredients!
@davidtappe5337
2 жыл бұрын
Just read your comment. Thanks for saying how I feel better than I could. Myself saying same thing, “ thanks for the video, headed to Home Depot”.
@CoincidenceTheorist
2 жыл бұрын
Critical thoughtocasting. Proballama slottening. Connecto dotterdings just as pee wee herman says. Connect the slots. La la la la. Injecło bołs na nah nah na. Infect yo hahtrs c lot lotta clołs. Time fo fooorf shlotss. Insanity dots. Nan no bołs. You are now sending out your own wave bending. Mák ad drèss says yes when scännd they all ünknowns man. 7639 code types. Medïcull pröbés?? Hmm whatta ya kniw. Gotta download a bootoof skanner appp as your phone wont unoesss its older and has nfc specific abilities or so,thing. An old android i once had i bet would do it
@MichelLinschoten
2 жыл бұрын
I agree as a audio enthusiast, and occasionally speaker repair man for my local community and friends This channel is a gold mine of information, I have acoustical panels (thick compressed wool) in my listening room. And it made a world of difference in overall measurements (almost linear well beyond human hearing range) Never had it sound this good thanks to videos like this . It makes the audio community forum feel like a , absolute joke (in terms of legitimate information)
@JSAFIXIT
2 жыл бұрын
I agree completely. It's a "nerds" heaven.
@timekabolden5309
2 жыл бұрын
👏🏾👏🏾👏🏾👏🏾👏🏾👏🏾👏🏾👏🏾
@cwinla
3 жыл бұрын
In every one of your videos, you answer dozens of questions I've been pondering for years. no hype, no bs, no sales pitch, just the facts! THANK YOU!
@bruce-le-smith
2 жыл бұрын
100%
@mrdali67
2 жыл бұрын
It just show that no material is "perfect" for damping, and the ammount of money you put into purdy acoustic treatment panels for your home studio is insane and absolutely not worth the cost unless your a perfectionist and know exactly whats your problem frequencies is or the need of a bass trap at your listening point. The egg shells works pretty well for beeing "free" but so will having just regular carpets and curtains placed around the room, and some bed linnen placed on a hard wood ceiling can remove the worst reflections. Really fun to see all those materials react. It's also pretty inexpensive to just purchase some Rockwool and cut them into manageable blocks and ceil them by sowing some covers for them.
@theMuBot
4 жыл бұрын
An hour and a half ago I was complaining that I couldn't find data-based comparison of DIY soundproofing/noise isolation methods, made with a good understanding of acoustics, and a friend sent me to this channel. This is fantastic.
@laurabrown7556
3 жыл бұрын
One of the Best Ideas of SoundProofing is "SoundProof Curtains" That Stops Outside Noise by 80% (25 Db) Tested. Check Here: livesoundproof.com/best-soundproof-curtains/
@imho2278
3 жыл бұрын
Me too!
@imho2278
3 жыл бұрын
@@laurabrown7556 doesnt work on low frequencies.
@arpakyna
3 жыл бұрын
Manufacturers of glass or rockwool usually have absorption efficiency's measured and listed and are far more accurate than any DIY methods. That's really the info you need.
@rodhart2232
3 жыл бұрын
@@arpakyna no info beats doing it yourself. The reality is, They are trying to get you to buy their product. Far too many sellers/resellers openly advertise false and misleading info in public, take Ebay for example... If one was to click every listing for chinese electronics and report each and every one which was not 100% accurate.... Fark.... it would take a lifetime...
@bigclivedotcom
3 жыл бұрын
What a complex video to make. Good job, and very interesting results.
@TechIngredients
3 жыл бұрын
Thanks!
@BRUXXUS
3 жыл бұрын
I just realized your comment lines right up with the dates you were working on soundproofing your live streaming nook. :D
@evanparker
3 жыл бұрын
clive is the fucking coolest!
@daveedee3626
3 жыл бұрын
@@BRUXXUS I just realised KZitem recommends that I watch the same stuff as Clive, 4 weeks after Clive does.
@evanparker
3 жыл бұрын
@@laurabrown7556 why am i not surprised you're just trying to send us to your amazon referral links? how lame is that.
@parmindersinghnokewal4215
4 жыл бұрын
I leave everything. I put things aside. I give every priority, second priority and start watching your videos as soon as you upload them. These are the best tech videos I have even seen on youtube. Thank you!
@guffaw1711
4 жыл бұрын
Me too! I do this with videos from Applied Science as well, though I wish Ben's videos would be longer. Even though they are long videos I watch them all the way through in one go, unlike many videos from other science channels which are much shorter. It's because I expect to actually learn something new from Tech Ingredients and Applied Science and not hear the same general information about a topic I already know again and again like on the popular science channels. And I also think engineers make the best educational content for some reason.
@Jimunu
4 жыл бұрын
@@guffaw1711 check out thought emporium if you like content like tech ingrediens.
@phredd6070
4 жыл бұрын
At least Im not the only one who does that. I saw a new video was posted and stopped painting the kitchen, threw the brushes and rollers in the tub with some soapy water and clicked the play button.
@LILLJE
4 жыл бұрын
Sheep
@electronicengineer
4 жыл бұрын
I couldn't agree any more with your comment! Thank you!
@swedishvoice
3 жыл бұрын
I love the fact that these videos are not sped up. It's relaxing and gives you the time to follow along and digest the information. You're doing a great job! Keep it up!
@TechIngredients
3 жыл бұрын
Thanks!
@FesixGermany
4 жыл бұрын
"Human malware event", that's a good one
@maxlee6676
4 жыл бұрын
it's my fav. think it comes from gamers nexus
@WildEngineering
4 жыл бұрын
@@maxlee6676 GN gang
@Francois_Dupont
4 жыл бұрын
Chinese biology rejects.
@mr.james_smith
4 жыл бұрын
Yepper that's the term I'm going to use... that, or the abbreviation: HME!
@electronicengineer
4 жыл бұрын
@@maxlee6676 Spot on. I heard him say it during a video a while ago.
@mangoauthority2897
4 жыл бұрын
Incredible how much work and effort you put in these videos. Thanks for sharing these and please keep on doing that. Appreciate it a lot!
@sillysad3198
4 жыл бұрын
the production and content quality of this channel beats all "pop-science" channels combined, with all their "after effects" and schite
@guffaw1711
4 жыл бұрын
Yup, this is quality content right here.
@difflocktwo
4 жыл бұрын
And that's an understatement.
@unlokia
4 жыл бұрын
When all you have to show is flashy intro sequences, that's all you have to show. Even then, those intros are SO SO OLD, no one wants to see 2m+ of stupid neon text whizzing around in a starfield with some "music" in the BG.
@rs2198
4 жыл бұрын
Engineering bob Ross / mr Rogers, just calmly telling us cool stuff, rather than yelling and shouting
@AtlasReburdened
4 жыл бұрын
Yup, it's like the difference between a full peer reviewed study and the 'science daily' breakdown of said study.
@electronicengineer
4 жыл бұрын
One can learn so much from you in only a single video. I am truly blown away by the sheer breadth of your knowledge Mr. Main Presenter. You are astounding to me. Thank you very much for taking out the time to shoot and edit these videos for us. I really appreciate it and you. Fred
@TechIngredients
4 жыл бұрын
Thank you and you're welcome!
@Morgow1
4 жыл бұрын
Tech Ingredients and DIY Perks are my two favourite DIY channels.
@NathanaelNewton
4 жыл бұрын
I was trying to remember where i saw the towel panels when he mentioned diy perks :)
@synchro-dentally1965
4 жыл бұрын
Have you guys checked out Robert Murray-Smith's channel? The main focus is around energy generation and storage but they'll discuss other educational diy content.
@wobblysauce
4 жыл бұрын
The thing with the panels, they work better if you don't have them solid to the wall, as then you have the sound travel more distance and like twice the thickness.
@chrisb4726
4 жыл бұрын
@@wobblysauce Yes, double-insulating, constrained layers, airs gaps - call it what you will. They all help.
@vonantero9458
4 жыл бұрын
As someone who's into DIY speakers, I had some issues with the speaker talk in this video. Not that everything was incorrect necessarily, but there were some blanket statements made from this one test that doesn't really even test that specific thing. The rigidity of the enclosure for example. The anechoic chamber will reduce some of the issues that not-rigid-enough enclosure would have. Additionally, we don't really know from this test where the line is for this driver. Maybe the first enclosure is completely fine for this driver at these volumes and doesn't need to be more rigid. Saying generally that there's no benefit for it is false. Another thing that was a bit questionable was the port test. When you design an enclosure, sealed and ported will not be the same size for the same driver. If the idea was just to show that having a port will give you more db in the low end, sure, but I think it should have been mentioned that this is not how you should do it. You don't just add a port to sealed enclosure, you calculate a completely different enclosure volume and then you need to add the volume that the port itself takes up. Also, what fq was the port tuned in the test? Was there a tube even? As it wasn't mentioned in the video, one could think there was just holes drilled to it. Then there's the dampening in the enclosure. Having the speaker in an anechoic chamber mitigates some of the benefits from the padding. Even if, without it, something would escape the enclosure, it would be absorbed in the walls of the chamber and would not be picked up by the mic. And again, maybe the enclosure itself is already dead enough for this specific driver. So if the dampening worked, how would you know? With both the rigidity test and the dampening test, you should measure the sound from the side of the speaker, not on axis with the driver. I do love this channel and I enjoyed the anechoic chamber part of the video, although I think you could have shown it's effectiveness a bit better. For example: Get a speaker that has fairly flat response, put it in the chamber, do the measurement, use a dsp to get the response as flat as possible and measure it again. This would be the control. Then you take the setup to a normal room and run the test again. This would make it very clear what the chamber does.
@TechIngredients
4 жыл бұрын
As you stated we demonstrated the effect of porting, but did not intend to provide guidance on optimizing porting for a particular driver. The reason the mic was aimed at the driver was that the enclosure material's effect on the driver performance was what we demonstrated, not how well a particular material blocked the rearward sound pressure.
@vonantero9458
4 жыл бұрын
@@TechIngredients Fair enough.
@electronicengineer
4 жыл бұрын
@@TechIngredients Precisely!
@kontoname
4 жыл бұрын
@@vonantero9458 If you're into DIY speakers you might have the same equipment and talent I'm assuming. Would be happy if you could demonstrate your claims in a scientific and measurable way in a video
@Casey_Schmidt
4 жыл бұрын
@Von Antero - I agree with your analysis. I saw several problems with the methods. In my opinion, frequency response isn't something that should be used along to determine the quality of sound. Two different drivers could have nearly identical frequency responses but sound completely different base on cone mass, cone material, stored mechanical and electrical energy, port loading, etc. So saying that the concrete/sound absorber made the sound "worse" in not wholly accurate. liter box with wool will not load the same as a 2 liter box without wool. Still a fun video though; regardless its issues.
@GiveThemHorns
4 жыл бұрын
I've been watching Tech Ingredients for a couple years and every episode makes me feel nostalgic for my high school Physics classes with Mr. Mathis
@RogerBarraud
4 жыл бұрын
Yeah, Johnny could sure sing up a great lesson...
@josepalacid
4 жыл бұрын
You were lucky so...
@totherarf
4 жыл бұрын
You know ......... "Physics is Everything!"?
@stathisbikos6563
4 жыл бұрын
when you flush with helium you should feed at the top and vent at the bottom
@FindLiberty
4 жыл бұрын
...and that lower vent should be piped back outside the main chamber (or the "door" opened for a short time just prior to the test) to prevent gas contamination in the main chamber.
@deleteduser3749
3 жыл бұрын
Then attach a helium-colostomy bag to catch and recycle the helium while its working.
@percival23
4 жыл бұрын
I gutted my house in Brooklyn and at one point it was all exposed walls & ceilings with the Roxul installed. The acoustics in these rooms was unreal. Your voice would just die in the room. I loved it but unfortunately the wife insisted that the walls be covered in drywall.
@NathanaelNewton
4 жыл бұрын
Stupid drywall smh 🤣
@cosmicrider5898
4 жыл бұрын
Couldve got sound absorbing sheetrock
@TheRCish
4 жыл бұрын
damn, owning a house in Brooklyn, you must be either rich or old
@MrXaeox
4 жыл бұрын
Would consider replacing the wife before the walls but that might just be me. :) j/k ofc
@ac.creations
4 жыл бұрын
Im working on a office building and almost everywhere is getting double layered 5/8s dry wall with sound glue in between then 1/2 in plywood on top and a layer of finish wood paneling. There is also Rockwool insulation inside the walls. I bet you could scream inside and you wouldnt hear it 1 foot away on the other side
@jimharmon3404
3 жыл бұрын
Being a retired old guy myself, I sensed your stress and slight grunt when hefting those speakers around. I offer two suggestions: 1. Swap the positions of the microphone with the DUT Device Under Test. This way the speakers can be suspended inside the shallow door and you won't need the loading floor. 2. let one of your undergrad students do the bull work. Your videos are really awesome and on point. Keep them coming!
@cho4d
4 жыл бұрын
oh i just noticed, 50 minutes. for most content that's too much. way too much. for tech ingredients content well i guess that'll do... could be longer tho ;)
@maxlee6676
4 жыл бұрын
so sad..!
@WhoTnT
4 жыл бұрын
At 2x speed it's only 25 mins
@procactus9109
4 жыл бұрын
Seems the barrage of adverts filled it out
@1christian1sonne1
4 жыл бұрын
More? yes please :-)
@concretesailors
4 жыл бұрын
@@procactus9109 - Firefox has a snap-in to stop the adverts from breaking up the video you're watching. I would recommend this snap-in.
@EstebanCarvallo
3 жыл бұрын
I felt like I was in college. I sat up straight and paid attention. He's good. Well done professor. I actually learned something and enjoyed it.
@TechIngredients
3 жыл бұрын
Thank you. A++
@ATX_Engineer
4 жыл бұрын
Love it when ya'll do audio! Gets my EE brain all happy.
@chrisgriffith1573
3 жыл бұрын
I used to use fleece blankets tacked to the my walls to deaden the echo in my house. It helped that I tacked the top and bottom of the blanket to a strip of 1x2" wood, hanging it so that it is pulled taught, about a 1/2" off the wall itself. As far as recording, I threw a blanket over my head, and above my computer, draping around my entire desk. The sound was more than marginally improved by this low tech simple use of blankets. Its fascinating to me how low tech materials can be used to produce professional results.
@thomascaldwell184
4 жыл бұрын
I just want to toss in general support and encouragement-- I love your methodical approach and careful analysis. Keep on doing your thing.
@theophiled
3 жыл бұрын
Thanks a lot, this will be of great help for improving my recordings! Note to myself : Conclusion for which type of acoustic panels to use --> 47:16 * floor : carpet * ceiling : acoustic ceiling tile * walls : acoustic panels or Rockwool panels covered with a thin layer of cloth (silk or polyester) to prevent the fibers from dispersing into the air
@peterm.souzajr.2112
4 жыл бұрын
this channel feeds my intellect, thank you for being thorough
@giu_br777
3 жыл бұрын
Brasileiro?
@TradeWorks_Construction
Жыл бұрын
I was doing a renovation of a basement that had full concrete walls for the foundation. After framing it out and then adding RockWool insulation I was amazed at the effect it had on my hearing and sound. It was like everything was being muted and silenced the usual background noises present in life … which was extremely discomforting and unpleasant. Not to mention communicating with the others became extremely difficult when we weren’t in near vicinity. As soon as the drywall went up the entire effect was mitigated and all was back to normal. Watching you put your head in the sound chamber reminded me of the experience but i can only imagine how much worse that chamber was.
@TechIngredients
Жыл бұрын
According to legend, some workers would have panic attacks when entering an anechoic chamber. I believe it.
@Desmond_Craine
4 жыл бұрын
Best educational channel I know. I'm noise evironmental specialist at my work and yours movies about acoustics are best found online!
@TechIngredients
4 жыл бұрын
Thanks!
@kbjerke
4 жыл бұрын
Ooooh!!! Can't *wait* for the LRAD video!!
@zoltankaparthy9095
3 жыл бұрын
You are a reminder of a saying from my programming days, "One test is worth a thousand opinions."
@procactus9109
4 жыл бұрын
I've not seen so many adverts in a single video for a long time. Thanks for reminding me to install adblock
@jimwednt1229
3 жыл бұрын
This video helps me understand the efficacy of. Low frequency radio and why it is used by the navy to communicate with their ships over vast distances . They have antennas that are thousands of feet across to pick up the low frequencies. Thanks for the edifying video !
@MrBush1a
3 жыл бұрын
manners and respect professor, as a young music engineer / artist you show me how fix my listen room , nice one thanks again
@thecrownedone
4 жыл бұрын
I enjoy these optimization-type videos. I'd like to watch you 3D-print, test, and optimize various, unique fan designs with your typical clever thinking.
@planesimple8514
4 жыл бұрын
Forget the smoke bombs and the noise(well, not really but just making a point) and keep these awesome detailed, informative, educational videos that are gems. These types of videos are in great shortage on KZitem. Great work guys, keep it up. It makes me happy to see your channel succeed.
@hawkeyes4768
4 жыл бұрын
2 mins in and i am excited af to see these results
@nehirpro
3 жыл бұрын
You have worked hard. Watched videos that took thousands of hours yet you are here. Here is your prize... Welcome to the best part of KZitem. Here we people argue over acoustics and it's measurement techs.
@JonathanEvans73
4 жыл бұрын
What's up up with the all the TP on your wall? Oh you know, acoustics and crap.
@tiberiu_nicolae
4 жыл бұрын
Would epoxy infused fecal matter be a good acoustic dampener?
@girrrrrrr2
4 жыл бұрын
@@tiberiu_nicolae could be. Might need to test it.
@petercolquhoun2086
4 жыл бұрын
For when "it" hits the fan.
@diegodoumecq5144
4 жыл бұрын
It cleans the sound?
@gregb7353
4 жыл бұрын
That TP wall would have been the most expensive to construct of the bunch back in May 2020
@h4expo
3 жыл бұрын
You know someone has good content when you spend 50 minutes watching it and at the end ask your self "Why did I just watch that whole thing?" but you finish satisfied anyway.
@MarcusWolschon
4 жыл бұрын
Combining these with the "Active Noise Cancellation" video you made 2 years ago would be useful and cool. Back then you did promise some updates on the box "in the next weeks" but that never happened.
@RogersAdams
2 жыл бұрын
Discovering this channel has changed pertty much everything. For me the videos are powerful and challenging learning experiences. I liken the channel to meeting a new best friend. By watchig just one and looking at the list of titles I have new ideas and things to discuss with others. This channel makes me even more thankful KZitem exists today. I have often told others had there been a KZitem when I was a child my life would be even better than it has been now for 75 years.
@KeenanTims
4 жыл бұрын
Hardly an expert, but I had always thought that both the internal 'stuffing' in speakers as well as the avoidance of ported speakers were to reduce distortion, improve phase response, not to flatten the frequency response, and that using dense materials was to try to make the driver be the only vibrating element, rather than the sides of the enclosure. Your SPL tests don't really address either of these factors, and if I understand how REW is measuring here, it's generating a stimulus signal and either bandpass filtering the response and measuring SPL, or just measuring total SPL, so harmonic resonances here would probably show as 'improvement' or 'no change' even if it sounds horrible? And any off-axis output will be attenuated by your anechoic chamber, and even if it were measured would again just increase SPL even if it results in 'multipath'. I'm curious to see well thought out and well presented empirical tests like this on these topics. Maybe I'm wrong (and would be interested to learn why these factors aren't!) but I don't think what you've done here has really addressed the reasons that designers choose dense materials, internal stuffing/insulation, or the tradeoff of adding ports.
@pcbuildfrance
4 жыл бұрын
Totally agree with you. Same goes for concrete vs std enclosure. Measuring spl doesn't say anything. You would have to measure harmonics, vibrations, etc. He could compare concrete vs standard when positioned backwards to the microphone. This could show something. Then again this anechoic chamber does nothing for low frequencies and those will have most impact on case resonance and effect of absorbtion inside enclosure...
@MarkTillotson
3 жыл бұрын
I think cabinet resonance gets rapidly more of a problem as the size increases, as the stiffness of a wall falls as a high power of the dimensions, so that the resonances drop right into the most sensitive part of human hearing. Speakers around 40 x 60 x 100 cm would be a better test for this, more the PA speaker size than bookshelf sized.
@JohnJackson66
3 жыл бұрын
The whole section on wall rigidity and internal damping completely misrepresented why manufacturers strive for this. If your objectives is to maximize dB/W by all means follow the advice. If you want fidelity please ignore it. The acoustic panels section was more useful, however I don't understand why he didn't put the panel he was testing inside his chamber over a wooden panel.
@rationalmartian
3 жыл бұрын
I think you could possibly be labouring under a couple of misapprehensions. The stuffing inside a speaker in effect makes the cabinet seem larger, it slows down the sound. It also helps absorb resonances and stop re reflected out of phase sound going through the driver cone. It is almost transparent to the re radiated sound from the inside back surface. Which confuses and muddies the sound. A port or slot, Bass reflex port is to control the cone as it gets to it's resonant frequency. If designed correctly the air mass in the port will be out of phase with the driver when resonance occurs, damping cone excursion and making the output more linear. It also helps boost output when in phase, helping lower frequency output. BTW. A speaker is the direct opposite of a musical instrument. It should ideally have no character, colour or impart anything extraneous or extra to the sound. That is the goal. Cabinet resonance is a killer. Stiff, solid and dead is the way.
@ttmitcham
3 жыл бұрын
So many considerations are being completely missed, or mischaracterized. For example, there's very little discussion about how the anechoic and partial test enclosures construct and destruct frequency modes (variously mischaracterized simply as "reflection" or "absorption" of sound). There's also nothing mentioned about the T/S parameters of the drivers, esp as regards their performance in sealed vs "ported" cabinet testing. Then using variable smoothing skews the results. This is a great example of someone who has 75% knowledge in the field, discussing things with confidence and conveying a sense of unfounded expertise. A bit of tweaking of his testing process employing the inverse square law could actually yield some legit results.
@heydn90
3 жыл бұрын
I met this channel for pure luck and I love it. One of the best engineering channels I've ever had the pleasure to see. Keep up with the great work!
@TechIngredients
3 жыл бұрын
Thanks, will do!
@Redsammeh
4 жыл бұрын
Are you a retired physics/engineering Prof? You seem to know a heck of a lot about a lot of topics
@MrEazyE357
4 жыл бұрын
He won't tell you. Pretty sure he's an alien. Shhh...
@salvatoremilitello8490
4 жыл бұрын
He has said in several videos he is a retired rocket scientist / engineer
@unlokia
4 жыл бұрын
"Tech Ingredients" + "Smarter every day" are REALLY REALLY intellectual, educated scientists with incredibly intelligent minds. They put 99% of the go-to, so-called "science" YooToobaz to shame. Experience shows, and most of them don't know jack.
@AtimatikArmy
4 жыл бұрын
One think is certain, he is 100% engineering minded. I think an unintended byproduct is that engineers make excellent communicators and teachers. Their way of communication is always clear and concise.
@sturnus111
4 жыл бұрын
I know, but I won't tell.
@williammorton8555
3 жыл бұрын
Your skill at improvised engineering is outstanding!
@TechIngredients
3 жыл бұрын
Thank you!
@kirkcreelman
4 жыл бұрын
This was interesting but you missed the whole point of high density enclosures. It's not to improve the overall inline frequency response but is about reducing secondary sources of out of phase sound? This of course will be largely lost and barely measurable in your anechoic chamber. I don't live in an anechoic chamber and it will be much more pronounced in an ordinary room. To check , mount a piezo accelerometer to the side of the case (wax, or hot glue if you don't care) then measure the "noise" on the side of the enclosure. This is what's entering the room as part of the sound field and is in direct conflict with the intended sound from the driver. High mass also allows the driver to move fore and aft while keeping the enclosure at rest. physics of action reaction. If you hold the enclosures and feel it vibrate- it's not heavy enough. I agree with your room treatment recommendations. In the test, your microphone was always at the same standing node as the chamber size was altered with various material thickness. This is why the dips shift around with thicker and thinner treatments. Different frequencies live in Different size boxes. When you turned the speaker around in the chamber you should not have covered the back. The point being , we don't want any noise emanating from the backside so if it's louder it's bad. Thanks for another great video and the time spent setting it all up. I enjoyed watching👍
@cschlater
4 жыл бұрын
Add to that the fact that different frequencies affects other frequencies in different ways. They can cancel eachother out or they can seemingly boost eachother. When it comes to sound, if it experienced as pleasure or pain, it's a question of how the different frequencies are combined. The combination is allways dependant on what you put through the speakers and the most pleasant sound experience is achived when you most effectively can reduce the unpleasant combinations of frequencies, which also are dependent on the dB for each frequency. The above is what is used in film and music to affect the emotions, to bring forward feelings of joy, happiness, sadness etc. Different tunes sound in different frequencies with subfrequencies working in subliminal ways that brings your entire body to ring in different frequencies. That said, I must also add that the toilet paper rolls seems to be the material that most easily could be fine tuned in the environment that they are used. Living your life in a good sound environment is good your health and if you allways experience crappy sound, you most certainly will be in a worse situation healthwise. The right to good sound should be mandated by law. Crappy sound should not be allowed anywhere.
@0dWHOHWb0
4 жыл бұрын
The point of the rotated speaker experiment was not testing whether the back side of it emits sound, but rather to see how well the wall material of the chamber reflects sound.
@TropicalCoder
4 жыл бұрын
@@cschlater "When it comes to sound, if it experienced as pleasure or pain, it's a question of how the different frequencies are combined. " What an interesting concept you describe. What comes to mind is if various sounds add up to a major chord (for a sensation of joy) or a minor chord (for a sensation of sadness), etc.Then depending on where the peaks are, we could end up with a mournful sound or a happy sound. Is that what you are saying?
@kirkcreelman
4 жыл бұрын
0dWHOHWb0 Yes. I understand that.
@FindLiberty
4 жыл бұрын
Kirk Creelman, YES that one particular Microphone model's sensitivity curve, mounting suspension and placement (Rx node location) were other variables to test and compare (and maybe adjust for); the test speaker's position (Tx node) would also affect results. Three of the chamber's inside walls could be moved off of those plumb/square 90 degree angles too. Could electrostatically like-charged dust be suspended within the chamber air, be illuminated by laser or polarized light and photographed to "see" the standing sound compression and reflection waves? Eliminate all those test chamber reflection challenges by thinking BIG: Take the entire test speaker and microphone apparatus up, way up, a few thousand feet up in the dead air of night, far from city noise source, separately suspended on elastic ropes hanging 100' below two (ground tethered?) hot air balloons. Be sure to also record the balloon separation distance with laser or GPS, the test altitude and air temperature.
@macbouncer8525
4 жыл бұрын
in the 80's in studio design, we used big 6 foot long, 4 foot wide industrial "dirt trapper mats" hung on the walls. A close weave poly type material on a rubber backing. Stapled at the top and "hanging" free at the sides and bottom. Worked really well an enabled, with the use of a spectrum analyser to get the room frequency response curve pretty much flat. What you heard was what came from the speakers. Void chambers, in effect a wooden box with a port in it were used to absorb low frequencies... the size of the port centered on the frequency you needed to get rid of. A happy trip down memory lane. Many thanks.
@kbjerke
4 жыл бұрын
Radio Station KORN (from Hee-Haw) used egg cartons in their "sound booth." Thanks for the video!!
@thedevilinthecircuit1414
4 жыл бұрын
Charlie Farquharsen!
@kbjerke
4 жыл бұрын
@@thedevilinthecircuit1414 THAT's the guy!! And proudly Canadian!
@timebrickey7864
3 жыл бұрын
I just came upon this channel today and I'm in heaven 😍 thank you for these thorough and inspired videos
@CyclesAreSingularities
Жыл бұрын
in audio there's so many myths and believes so i just love when someone comes along and shuts these people up with easy to understand experiments
@garyschraa7947
3 жыл бұрын
Back in the 70's I had the great fortune of my next door neighbor becoming a mentor for me . I'll never forget the experience of knowing a guy as advanced as he is . If I may brag for a second while I remember those days . Dave had two pairs of Bose 901's (series 1 & 2) He had two Wharfedale cabinet subwoofers . A really elegant Nakamichi 700 / 3 head cassette player , a carver pre-amp and a studio quality S.A.E. equalizer , as well as the active Bose equalizers . All of this was coupled by monster cable w/gold fittings . If that weren't enough , he also had a Thorens turntable with the famed 'Rabco' arm . (Every) once in awhile he would ask me to sit in the middle of the room while he played a pink noise album that guided him through the set-up for his SAE . He said my young 17 y/o ears could pick up nuances he'd probably miss . About 45 minutes later we'd be listening to the 1812 overture with live canon fire and all . Man those were good times . I'm 57 these days but that set-up was unforgettable . Thanks for listening .
@dizzolve
4 жыл бұрын
2:13 so THAT'S where all that toilet paper went
@SpectrumDIY
3 жыл бұрын
I love this so much (Granted I'm autistic and have Sensory processing disorder, it makes sounds really... quite a lot sometimes, so sound proofing has brought me here), it feels very stimmy to see how effective different materials are.
@chrisw1462
4 жыл бұрын
Guessing from the reverse speaker test your chamber has a slight resonance around 575 Hz. Probably just the right wavelength for the chamber dimension.
@FSXgta
3 жыл бұрын
The chamber is way too small. You have to use huge anechoic chambers if you want accurate measurements
@valexalex6187
4 жыл бұрын
I do appreciate the detail you go through these videos. I get a lot out of these, and try to teach these principals to my kids.
@TechIngredients
4 жыл бұрын
Great!
@franknewling1139
Жыл бұрын
Well done, thanks! I'd like to see the result of using soft cotton towels over the mattress foam in your chamber. It seems that they might cause a disruption and dispersal to the waves before and after hitting the foam surface. Thanks again for another great video!
@basementphysics6334
4 жыл бұрын
When are you going to resume the rail gun project? I was really looking forward to it.
@AP-ep3xh
4 жыл бұрын
this was literally my science fair project to test which would be the best sound-absorbing materials. If only this video was out back then wouldn't have had to make so many boxes. Thank you!!!!
@AP-ep3xh
4 жыл бұрын
next time can you also have a control please!
@d3tach3d
4 жыл бұрын
Your entire shop is so beautiful. I love how big the tall the upstairs portion is. Is that also your mancave in a sense? Did you build it? Corey - Eugene, OR
@TechIngredients
4 жыл бұрын
Thanks! Take a look at our video on "The Lab Tour"
@basspig
4 жыл бұрын
Property taxes on something like this where I live would be at least 25000 dollars. No can do.
@DmitryMyadzelets
4 жыл бұрын
The best "DIY Science" video about sound/acoustics I've ever seen on KZitem! Enjoyed every minute of it! Really appreciate all the explanations of what you've done and why. Thank you all. I dived into acoustics year ago having a goal to fix terrible reverberation time (RT60 > 5 sec) in a lecture room. After hours of research over Internet ended up buying absorbing material (panels) to hanger it under the ceiling. But before putting it in place I couldn't miss the chance to check how it would improve acoustic properties of my room at home. So, now I have about 30 measurements done with REW with different number of panels put in different places. Next I'll compare the RT60 curves to see if the results correlate with my intuition and how to actually treat such a small room to get optimal acoustic properties. Here comes the question: Are you going to compare absorbing properties of materials? Having the anechoic chamber you can check how thickness of rock-wool changes its absorbing property, how it compares to others (DIY Perks actually tried reduce reverberation time with towels). The best, to my opinion, would be to evaluate acoustic properties of your, say, living room, and fix it if there are some problems, with all this fantastic scientific approach you have. Thank you again. Some links you and others can find useful: * Safety of mineral fibers (a review): www.gearslutz.com/board/bass-traps-acoustic-panels-foam-etc/347314-comparative-safety-rockwool-fiberglass-organic-fibers-review.html * Room Acoustic Calculator (many producers, see at the bottom): www.sarooma.de/en/apps/web.html * Master Handbook of Acoustics, Fourth Edition (PDF): www.researchgate.net/publication/243525251_Master_Handbook_of_Acoustics_Fourth_Edition * The Sound Blog of Trevor Cox: acousticengineering.wordpress.com/trevor-cox/
@no_handle_required
3 жыл бұрын
Every video I watch on this channel leads me to watching another one. I may just end up never sleeping again.
@minilab9030
4 жыл бұрын
Listening to a serious engineer who has passion curiosity and extraordinary ability is a thing of beauty. There are so few, but they do such extraordinary work. Thank you for educating other primates.
@dominikkriss1853
4 жыл бұрын
Well, I'm courious how you can read resonances from freq response graph. I'm not sure how exactly REW works, but i assume, that this graph is constructed paralelly to sweep which is playing e.g. when sweep is in particular freq this freq is than written to graph it that exact moment. In my understanding this is frequency response graph. I think you should use waterfall diagrams, to detect resonances, and to test thoose materials. As far as I know waterfall graphs also contains time as third axis, and there you can decet resonances. I have to suggest Nathan's artiacle about this topic: www.sounddesignlive.com/how-to-measure-and-treat-resonances-like-room-modes-and-standing-waves-with-smaart/
@GigsVT
4 жыл бұрын
yeah I think there's a fundamental flaw in the final part methods. Besides people care about reflected energy mostly, not resonance
@kovacika
4 жыл бұрын
This. He has some understanding of the topic, but his terminology is inaccurate and while his conclusions on a macro scale (the overall idea) have some validity, he is missing some of the details that really show what is going on. That said, the only way to learn is to play with it! I'll never begrudge a man time in his shop measuring speakers!
@4n2earth22
4 жыл бұрын
Agree. Perhaps the general knowledge he has is good, but the presentation fails miserable in conveying real understanding of the principals.
@Anonymous-sb9rr
4 жыл бұрын
Resonances show up as spikes in a frequency chart, which is also the main reason that resonances are unwanted, they amplify or dampen the sound at the resonant frequency.
@kovacika
4 жыл бұрын
@@Anonymous-sb9rr How can you tell the difference between a spike from resonance or a spike from reflections or a spike from driver/cabinet design? More data , particularly in the time domain is required to make educated guesses about what causes each peak.
@obudaifourty9
3 жыл бұрын
Lots of your explanations, make a good sense, and helps ALL learning this technique. Thanks for the tutorial.
@proffessasvids
4 жыл бұрын
Thankyou for this lovely vid.. i have a couple of gipes.. When you tested the toilet rolls you didn't have a hard panel attached behind them.. this is the reason for the drop in the midband. Also Cabinet stiffness is extremely important but it's down to spl you are asking the speaker to produce aswell as the tone. At higher spl's the motion of a non ridged chamber's walls will radiate their version of the source material. Also I would add that introduction of damping material into a sealed bass enclosure serves to lower the q of the chamber, relaxing the LF roll off of the system below the system resonance. You can perform an impedance sweep on the drivers to glimpse the effect. Midrange enclosures benefit from stuffing also as it can be used to ease the severity of modal peaks from the chamber. Much love xx
@ZenDragonJP
4 жыл бұрын
There is a sound quality concern with porting; "transient response" can degrade vs sealed. Did you use TS parameters to design your boxes? Anyway, transient response would be difficult to objectively measure, but experimenting over time with subwoofer enclosures I can say there is an appreciable subjective difference. Also as far as reflections inside the speaker box, maybe as a future video you could construct and test different shape enclosures? Optimally the panel directly behind the loudspeaker would not be flat. The less flat surface area in the box (all sides but directly behind the speaker especially), the more smoother response overall. (Reference: Loud Speaker Cookbook from Vance Dickason)
@rich1051414
4 жыл бұрын
Porting hurts and helps. It increases the deflection at a given current, but it returns to center much slower. It's what gives ported bass it's 'sloppy' sound. A sealed sub takes more energy to produce the same deflection, but the vaccuum generated behind the cone will help it return to center, speeding up the response of the speaker, making bass sound 'tighter'. Ported bass will sound louder at a given wattage, but it will also almost seem lagged and loose.
@StephenKoplin
3 жыл бұрын
I love there's a little plastic recorder like I had in elementary school next to the computer monitor. Normally I'd wonder what in the world someone would have one of those for, but for this guy, I'm sure there's a great reason
@3isr3g3n
4 жыл бұрын
"Human Malware" Do you happen to partake in the content of a certain Tech Jesus?
@4IN14094
4 жыл бұрын
Based on viewers suggestions to avoid KZitem completely broken algorithms auto ban.
@Saphire_Throated_Carpenter_Ant
4 жыл бұрын
He seems like the hammer on box type of guy...
@ad2181
4 жыл бұрын
He saying SL-COV-WIV-1 and its genetic modified variants that we are suffering. Aka W#han flu.
@zapwatt
3 жыл бұрын
This channel is so good that it makes up for a lot of the fodder on youtube. Thank you so much.
@Godshole
4 жыл бұрын
" In space, no one can hear you scream." Oh come on! Someone had to say it ;) I have an ex who I wouldn't mind clamping in a soundproof box. She's a singer too..... I am faced with a dilemma. stay up and watch this, or restrain myself and go to bed. Flipped coin says BED. Oh well.
@RogerBarraud
4 жыл бұрын
I'm betting the next event was "Screw you, stupid coin!!11!" and a binge watch of these videos :-)
@N.M.E.
4 жыл бұрын
*continues to watch anyway*
@m3chanist
4 жыл бұрын
good call, this video at least will probably still be here tomorrow..
@Godshole
4 жыл бұрын
UPDATE. I did go to bed, and as I predicted completely forgot I wanted to watch this. So thanks to you all for reminding me I wanted to ;)
@N.M.E.
4 жыл бұрын
@@Godshole haha nice!
@alteans
Жыл бұрын
excellent testing methods, very meticulous, right to the point no .b.s.......after years of no one believing me when tested some of these materials ,in the local music stores...most ppl called me crazy..Here is the proof with the perfect explanation..I wish I known you back in the early nineties when I was working on this stuff..well I tried to anyways...always short on materials and equipment🙄 . feel like Johnny come late..those days are gone😒 Thank you for the videos👏👏👏
@RogerBarraud
4 жыл бұрын
31:10 Were you just talking during that sweep? :-/
@davemarm
4 жыл бұрын
Good catch
@MmeHyraelle
4 жыл бұрын
Yea i hope it was voice over :)
@gbaker6478
2 жыл бұрын
I appreciate the work put into this, I learn things that change my mind on what seems like a great idea, ex. Stuffing speakers with foam. I can see now how that is a bad idea. Treat the room, no matter how I try to escape that it always comes back to treat the room. Sonopan anyone, I think that's my answer.
@dougsensei
4 жыл бұрын
I don't know where KZitem has been hiding my tech ingredients for the past few months, but I'm glad I found it again!
@zazoomatt
3 жыл бұрын
So so HELPFUL, Very well Done. Admoration is OFF THE SCALES. The Best.
@defdogg2951
4 жыл бұрын
I absolutely love the work you guys do. Even if I only understand half of what you’re doing.
@TechIngredients
4 жыл бұрын
Thanks!
@bigGWM
3 жыл бұрын
i was just looking to what i could use to build sound panels in my theater in the basement . the room came with acoustic tiles 2x4 feet in the celling like you had good luck with, and carpet on the floor but the walls were wood paneling. the is where my problem is. I have some hot spots with the bass the main one is a corner that muddies up the bass terribly , there are other panels that rattles a bit. i have in past years ive put additional screws that did help some So i took a couple of cushions off the couch and moved the around and found the trouble spots. that s when i decided to build some sound panels. and was trying to fine the best product at the best cost .watching your video was very informative and the way i see it i going to use acoustic tiles. the price is dead on and they will be able to fit anywhere if i have to cut them. Thanks for all the time and cost you put in to come up with a solution that has saved me cost , time and efficiency this really set me on how to handle this. i will let you know how this comes out. Garry M
@rango_dinamico
4 жыл бұрын
Tech Ingredients & Project Farm are the only two youtube channels I need.
@sstobbe1817
2 жыл бұрын
Stumbled across this information while searching for some information about monitor speakers and room optimization (as far as it's possible for the room and budget). The information is clear and interesting. Even if it's not the depth of information I was looking for right now. Understandable language and brought with a "no nonsense" attitude. I like it.
@kevineyster1ify
3 жыл бұрын
I wanted to say that I really enjoy your videos. My father was a mechanical engineer and a project manager. He built power plants and refineries, he also was President of Ruston Gas Turbines. I personally did not get my degree however because of the exposure and my ability to understand engineering and physics I watch and study many highly technical fields. Recently I been building high end audiophile grade custom speakers for myself and trying to move into commercial and private elite customers. Your series about materials has helped me make decisions about materials and some of the very small decisions like porting and insulation. I always have thought insulation was a anti speaker additive. In otherwsrds if you need insulation maybe your box is the problem. Anyway love your videos all of them and I would like to see you take on crossover networks and how to build them and test them and the speaker technical specs and what works and what is a waste.of resources.other videos I have watched place your biggest gains in quality of sound can be achieved with a better crossover network.
@JackHackaday
Жыл бұрын
Best channel no contest. Thank you for your effort, talent, and production sirs.
@DJaquithFL
4 жыл бұрын
Makes me appreciate my B&W 800 series monitor speakers; they're tested individually, sold/replaced in pairs and results included. Wow those wild responses would drive me nuts. However, that's absolutely not to take away anything from what you've done here.
@lukefletcher9243
4 жыл бұрын
I LOVE KZitem. Seriously thank you for this video it was so immensely helpful and had all the information that I have needed for the last few months.
@TechIngredients
4 жыл бұрын
Thanks and you're welcome!
@eaglemount98368
2 жыл бұрын
Excellent, informative. I'm building my home system and need and appreciate all the information I can get as a novice. I have looked for a concise video of the physics of just how audio systems function - input signals, preamps, amps, out puts etc and not finding that, am putting together videos and articles that I find informing. This was among the best and most informational. Thanks so much. I'm subscribed and looking forward to more...
@chrisodillman3355
2 жыл бұрын
this is pure gold. i am so impressed by your knowledge. incredible how people sometimes spend their time and focus their energy. thnk you so much for sharing all this
@TechIngredients
2 жыл бұрын
Thanks!
@joec.9833
4 жыл бұрын
You and the camera person are legends.
@rogerfurer2273
4 жыл бұрын
I thank you for all your videos. You cover many subjects I'm interested in. I worked in recording studios for several years and, as far as sound and acoustic design goes, one of the biggest problems in control room design is taming the low frequencies in small rooms, given that a 20Hz wave length is approx 60 feet (1/4 wave of 15'). One of the most interesting design concepts I heard about, instead of bass traps, is using heavy panels suspended from the ceiling and located a certain distance from the wall. The calculations I heard were: the area of the panel determines the effective frequency, and the distance from the wall surface determines the bandwidth. The mass of the panel determines the amount of energy it can absorb. These are used on at least one wall of each room dimension, so one at the back and one on the side. The room I saw these in had one on each side and a third at the back. I would love to see you tackle this subject and test the idea.
@TechIngredients
4 жыл бұрын
Look up fabry perot interferometers. Interestingly, the smaller the gap, the wider the bandwidth, but the less intense the interferometric interference. I don't know how the area would relate to the frequency assuming the dimensions will always be sub wavelength. I'll take a look.
@rogerfurer2273
4 жыл бұрын
@@TechIngredients I would think that fractions of 1/4, or 1/8 wavelength would act to absorb specific frequencies. The idea being to tame standing waves in a room that has parallel walls and problems because of that. Of course listening levels will play a large part as the acoustic energy couples more strongly to the structure.
@armandoarellano6405
3 жыл бұрын
This is great, thanks! I was just wondering if the towels were a good material to use but glad I came across this video afterwards.
@butziporsche8646
3 жыл бұрын
I am using Lowther drivers in horns front and back loaded and valve amplification. I am returning to vinyl as well. This video reminds us of why helium is used to pressurize high performance Sterling engines.
@jamesmorton7881
4 жыл бұрын
Mr. Wizard with some humor. Excellent,, two thumbs up
@Testfortest142
4 жыл бұрын
This is the main topic why I watch your videos
@KyuketsuNinja
2 жыл бұрын
yes that REW software is what i need to fix my problem ... now i can equalize my speakers! i use Equalizer APO for that task.
@Friedbrain11
4 жыл бұрын
That's why bass doesn't need a specific direction to be heard well unlike treble which is very directional. Good testing and interesting to see the actual signal loss with various items. However, the DIY bath towels was stretched across a frame and worked best with one on each side. Low frequencies are the hardest to control.
@Coneman3
3 жыл бұрын
This guy might have the best shed in the world.
@CoolMusicToMyEars
Жыл бұрын
I find your KZitem channel very interesting 👏 I can remember my sisters old lounge with very thick floor to ceiling velvet curtains they served two purpose 1 to keep the room warm that was their main purpose, 2 they were amazing to deaden the room reflecting areas although not intended for that purpose but very impressive 👍 Philip from Cheshire England UK 🇬🇧
@TechIngredients
Жыл бұрын
Thank you!
@alistairboak3128
2 жыл бұрын
I bet there are a lot of Recording studios kicking themselves after spending millions on their anechoic chambers to realise that maybe they could have spent considerably less? Very good and fun Video, and I hope you really didn't get an injury from lugging those concrete speakers around! Thank you for your videos.
@MarkTillotson
3 жыл бұрын
That's a whole lot of experimentation that's really useful to those of us without the space or resources to do, and I hope you can continue with some more followups, perhaps into different drivers, speaker placement, enclosure size etc.
@TechIngredients
3 жыл бұрын
We will.
@CITYBORNDESERTBRED
4 жыл бұрын
Man I love this channel, 2mins in and I’m freaking stoked! *pops popcorn*
@CITYBORNDESERTBRED
4 жыл бұрын
Wish you would’ve seen Homerenovision’s work regarding acoustics.. I’d love to see how 2 sheets of 5/8 sheet rock with some of the acoustic goo would rate on your test bench. Regardless, fascinating
@LasVegasVocalist
4 жыл бұрын
This was very cool video. A bit long but was informative and I understood all of it. In my younger days I did Live Sound Reinforcement for indoor events and used very similar tools to tune the EQ's for the rooms we were using. The sound difference is quite amazing when you properly tune a system to the room and then fine tune once the audience is in place. Did this for almost ten years for a great company called RMS (Results in the Management of Sound in Hollywood, California) and yes the name is a play on the word Root-Mean-Square. Unfortunately they went out of business in the mid to late 90's.
@tsstsstsstsstsstss
4 жыл бұрын
Cool. We usually use ISO354 when measuring sound absorption on panels. It works by placing them in a reverberation room, the opposite of what you use with your speakers, and measure the difference in reverberation with and without the testing materials.
@TechIngredients
4 жыл бұрын
Interesting.
@Mckay2455
3 жыл бұрын
My man gets back from work, only to sit back and do more work. I love this
@lisakingscott7729
Жыл бұрын
On the toilet roll sound absorption, it reminds me of a high quality 1950s loudspeaker which I dismantled many years ago. It used loosely layered tissue, very similar to toilet paper, with a thickness of about 59 to 100mm of the multiple layers as sound absorption material. Most of the thickness was air. The paper was much bigger area than toilet paper and was just tacked into the cabinet in the corner edges of the box. Subjectively it had much better sound absorption than commercial acoustic foam or blanket. The only drawback that I can think of is that it must be a huge fire risk if anything in the speaker or its connections overheated.
@QuantumDigital2017
3 жыл бұрын
One he11 of a salesman right there. Great YT channel. Keep em coming. QDE 2020
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