I am a professor in Speech-Language Pathology (Communication Sciences and Disorders) and use a few of your videos to supplement the Audiology content in the upper level undergraduate course "Speech and Hearing Science". My Ph.D. is in Voice and Speech Science, and I appreciate the manner in which the content is presented. Very well done, thank you. I believe I may be inspired to create some similar video tutorials in the above mentioned areas. Christine Bergan, Ph.D., CCC-SLP
@jenreeder616
4 жыл бұрын
My cat has been sleeping soundly and her head just shot up in a very alarmed way at the sound of the high pitch lol... Great videos, thank-you, I am a nursing student and my anatomy classes have gone online, and we have to teach ourselves...this is a wonderful resource. Thank you
@justinmalek5446
10 жыл бұрын
All your videos are very helpful. Even for medical students!
@InteractiveBiology
10 жыл бұрын
Thank you Justin Malek. Glad to hear that :)
@inspiredcolours
8 жыл бұрын
I have spent literally weeks trying to understand this thing and you have explained it SO well in a simple language thank youuuuuu!
@ATA-wi2lh
7 жыл бұрын
I think the apex is wider and more floppy than the base of the basilar membrane. Thus, only higher frequencies have the ability to move the base of the basilar membrane whereas low frequencies can move the apex.
@elkhouh
11 жыл бұрын
Your videos are most certainly interactive...not to mention funny! Thanks for putting together educational material in such a great way!
@InteractiveBiology
13 жыл бұрын
@marazuka LOL. I was thinking I should record a CD of me screaming :D jk, glad you are finding value in the content. All the best!
@alexmarin7897
10 жыл бұрын
Great video but you are a bit wrong in saying that low frequency sound has larger pressure than high frequency sound. Sound is a longitudinal wave with compressions and rarefactions and since in the same medium the speed of sound is constant the wavelength is inversely proportional to the frequency. This means that frequency affects the distance between compressions but not their pressure level. It is acoustic power that affects the amplitude of the pressure. However frequency and perceived loudness are intrinsically linked, with greater intensity sound being required at low frequencies to produce the same amount of perceived loudness. That is because low frequency sound has a lower absorption ratio than higher frequency one and is also very non directional in its propagation (something that causes the effect of enveloping the individual without any discernable localized source). So to achieve the same loudness we need greater acoustic energy (in basses converted from electrical). Thus lower frequency sound has greater pressure than higher one FOR THE SAME PERCIEVED LOUDNESS. But if we use a speaker to create sound from electrical oscillations of equal amplitude and different frequency the pressure amplitude of sound will be the same regardless of the frequency. In other words the greater pressure you experience by basses is because of greater acoustic energy. The reason of different thickness in the cochlear membrane has nothing to do with pressure. The reason is to make its natural (resonant) frequency different in every area - think of a spring-mass system where you change the value of k (stiffness) to change f_res=(SQRT(k/m))/2π. Also it related with the distance the sound travels across the tube (see stationary waves). Anyway basically what happens is that each area in the membrane due to its different thickness has a different stiffness and hence different natural frequency. Therefore when sound of that frequency passes though it causes resonance and thereby larger oscillations.
@monkehp
5 жыл бұрын
5 star comment, thank you. I was wondering how it was possible that lower frequencies produced a greater 'force' according to this video. Awesome explanation and nice to hear that stiffness affects resonant frequencies, and actually the higher frequencies affect the stiffer basilar membrane near the entrance of the cochlea.
@adam847849
8 жыл бұрын
The Basilar Membrane near the base is stiff and narrow, while the Basilar Membrane at the Apex is wide and floppy.
@godhelpme8977
3 жыл бұрын
Yes bqsilar membrane s3x
@InteractiveBiology
13 жыл бұрын
@LittleDanzig You are very much welcome. We appreciate your words of encouragement. Leslie will definitely never stop making more Biology videos to help everyone with their learning. Do keep coming back as we have more videos to be uploaded very soon!
@InteractiveBiology
12 жыл бұрын
@richyboy230 You're welcome! Glad you understood it well. Please stay tuned. We will have new Biology videos coming very soon!
@Mustamaggara
10 жыл бұрын
you are an excellent teacher, A+
@InteractiveBiology
13 жыл бұрын
@katherinependragon You are very much welcome. I'm glad you find the videos helpful. Stay tuned for more :)
@taranehallahdadi7958
9 жыл бұрын
Awesome video! I just had a quick question. Isn't the Basilar membrane thickest near the oval window and gradually gets thinner towards the apex of the cochlea?
@katherinependragon
13 жыл бұрын
This is really well done and the diagrams and voice over are so helpful for a student struggling to understand the textbooks! Thanks!!
@Zaimulwaie
12 жыл бұрын
I should just skip my physiology lectures and watch your videos instead. it'll save me 52 minutes of my life
@waramasa
11 жыл бұрын
Thank you, Leslie. I watched 036-038 for the mechanism of hearing, which was really informative.
@thecrispyqueen
10 жыл бұрын
You are absolutely HILARIOUS and are helping me SO MUCH! Thanks Leslie :) xx
@InteractiveBiology
10 жыл бұрын
You're welcome Maria Farrell
@deepakbhoria4172
8 жыл бұрын
I was reading a book on digital speech processing, for better understanding stumbled on your videos. Now I understand things much better. Thanks for your effort, videos are great. But you have one contradiction with book, high frequency sounds doesn't mean high intensity. In fact human ear is differently sensible to different frequencies more sensible in range( 3-4khz ). For lower frequencies sound needs to be more intense to be perceived. Anyways, Please make videos on how sound is produced. Thanks.
@Stormbash
10 жыл бұрын
Why does hearing loss for people with ototoxicity/ or noise induced mostly happen in the higher frequency rather than the lower frequency?
@leilanibell1167
9 жыл бұрын
You broke it down beautifully so that I can understand the increased energy for creating lower pitched sounds. Thank you.
@raghavym4964
10 жыл бұрын
Isnt the apex thicker and less flexible in the basilar membrane?
@Denisey411
12 жыл бұрын
omg all your videos are so helpful for my physio class! my teacher sucks ass!! thanks to you I have a shot at passing! thank u!
@melinaharrie39
11 жыл бұрын
I wish you were my audition prof! Wonderfully explained and SO helpful.
@chrish1993
4 жыл бұрын
Helps me pray for restoration for those with hearing loss. Much thanks
@anthonyvolkman2338
7 жыл бұрын
Really cool, I really like how you put a fun side to it. Also is the human ear more analog or digital?
@jordilovesasn1230
4 жыл бұрын
You are hilarious. These videos are so helpful! I hear a familiar accent. Are you Trinidadian?
@Rattanjay
9 жыл бұрын
how can we fined angular sound, the sound come from specific angle or dimension ?
@Ighnaz17
12 жыл бұрын
Nice video and effort, but I have to say that you are wrong with some of the information. As the basilar membrane is getting wider going to the apical end of the cochlea, it is actualy getting less thinner. The explanation about low frequency waves having more energy is also wrong, high frequency waves actually have more energy and that's why they can move the basilar membrane at the basilar end of the basilar membrane.
@fadew55
5 жыл бұрын
One thing I've wondered for a long time and not been able to find anything on, is what makes different tone. Like a wood block vs a metal block, both hitting a A-432 hz, but sound different.
@tahirahad4276
10 жыл бұрын
This is very helpful for my Advanced Experimental Sensation & Perception class, thanks so much :-)
@InteractiveBiology
13 жыл бұрын
@Livinglifehigh LOL. Glad you enjoyed that rendition in D flat Minor :) Yep, Making Biology Fun. It's the only way to go :D
@sarastevens1488
11 жыл бұрын
This is a good question. I believe this video will help you to understand it better, if you're still interested in it after a month. (skip to 1:51)
@mhmudparky8232
10 жыл бұрын
Verrrry Nice , but , How would a lower frequency give us a greater force ??
@AliTuningIn
10 жыл бұрын
Exactly, don't lower frequency waves carry less energy?
@mhmudparky8232
10 жыл бұрын
Yes !!!
@busyboxst7
5 жыл бұрын
Lower frequencies, if at an audible ("equal") level (perception wise) require much more energy to be heard (google "fletcher munson curve"). In any music we listen to the low frequencies have MUCH more energy than highs. Look at how many watts a subwoofer takes to be heard vs. a midrange or tweeter. Look at how much a subwoofer moves (that's a lot of energy) vs. a tweeter. Our ears are more sensitive to highs (or high mids, say near 3-6K especially) partly because the ear canal is a pipe that's resonant near ~2-3K. Thus any bass we can hear as seemingly level is actually quite a bit of acoustic energy (and wind.. turn up speakers loud enough and you'll feel a blast of wind when the kick hits - careful of your hearing.) Peace.
@strgrl28
12 жыл бұрын
i'm a bit confused according to my text book, the basilar membrane is thickest near the oval window and thinner near the helicotrema. therefore the thickker regions harder to displace explaining why higher frequencies needed to vibrate basilar membrane
@anirbanpaul3817
2 жыл бұрын
Thank u sir for explaining the Concept in a very nice way ❤ 👌
@InteractiveBiology
2 жыл бұрын
You're welcome.
@InteractiveBiology
13 жыл бұрын
@pari020 We will definitely continue :D
@Djalitana
13 жыл бұрын
lets go to the next vid. I hope to hear soon what happens to neurotransmitters and receptors etc. very exiting. thank you so much. is there any reason to have that snail shaped cochlea thing? I mean it could have been done flat or so.
@naveengates2285
9 жыл бұрын
thanks man..your teaching way is simply amazing...keep going on..
@cilaumat634
11 жыл бұрын
Hi, is it possible to make a video on the rate-pitch (phase-locking of the auditory fibres) as well? It will help a lot in the teaching to the students to see the illustration. This video describes the place-pitch very well. TQ.
@Cristiancruz424
11 жыл бұрын
you said that if the frequency is low enough its force can vibrate the whole membrane> so if that happens, does it just sound low or low and high?
@fa911662
8 жыл бұрын
The best videos on the subject thank you very much. I have seen that you entered in khanacademy Are you still doing biology videos ???
@beheshtehabrahimi8032
6 жыл бұрын
Excellent video for someone who is not so sure of the technicality of the brain 👏👏👏 mercy
@minielephant123
8 жыл бұрын
Thank you so much! Your videos are way more helpful and interesting than my textbooks
@trecime
3 жыл бұрын
I think the basilar membrane is wider and thinner(floppier) at the apex. Otherwise it is a beautiful explanation.
@sarastevens1488
11 жыл бұрын
This is a good question. There is a video by javitsproduction here on youtube entitled "How the ear works", which I believe will solve your question. Skip to 1:51 if you want to get to the part about your question.
@FrancescaG89
10 жыл бұрын
I really do enjoy your videos, but I have a question, you stated that it becomes thicker as it gets closer to the apex of the cochlea, but my text books state the opposite. That it is thickest near the oval window and becomes thinner. Can you please verify that for me?
@gregmcnany555
10 жыл бұрын
The basilar membrane does get wider towards the apex. The cochlea itself, however, is wider at the base and gets narrower towards the apex.
@alilewismusic
10 жыл бұрын
Your videos are great and are definitely helping me to get my head around all of this a bit better (am studying speech language pathology). But I have one question: my professor said that the signal actually goes from the stapes through the oval window and onto the Scala Vestibule. From there it eventually (somehow) reaches the Basilar Membrane. Assuming that he is correct how does that transfer of the signal happen (from the scala vestibule to the basilar membrane)? And would it be correct to say that, once the signal has reached the basilar membrane (and incited the appropriate section of that membrane to vibrate per its resonant frequency), the basilar movement then causes the the tectorial membrane to fan the cilia below- causing them to sway and ultimately send the signal to the auditory nerve and onto the brain? Thanks again!
@jessespersonalnerding
9 жыл бұрын
Hang on. I listen to a lot of electronic music and produce it as well, but is it possible for a frequency to be so strong that it breaks your ear? Like as far as bass goes?
@johngilmour8945
5 жыл бұрын
My High frequencies Are uncomfortable, and to lower volume to comfort level, I'm unable to hear the voices??? my layman language and not knowing enough about the sound to brain process, makes trying to explain to my audiologist my discomfort, in a vernacular, that will address the situation! the Higher frequencies distract from the words being spoken, the Pst - and St, beginning, and ending of words, is uncomfortable, to reduce the volume to a comfort level I'm unable to hear the spoken words? It has become very frustrating for me, as in my 4th or 5th tuning, after implant, it had a sound very similar to normal hearing, however every tuning after that made no benefit to the quality of sound! any advice, or direction would be most appreciated " Cochlear Nucleus 6" Thank You, John.
@ngozi5687
5 жыл бұрын
Super helpful and understandable video. Thank you!
@embids
10 жыл бұрын
very entertaining - you helped me understand it all much better!
@muhammadwakeel7294
7 жыл бұрын
Sir low frequncy sound has more force than why it cannot stimulate that part of membran that can be vibrated by high frequncy sound that has low force...
@sharlenezeederberg9134
5 жыл бұрын
So clear and helpful! Thanks
@ashishsaimon6511
5 жыл бұрын
Please explain place and volley principles as well.
@RoomOne001
11 жыл бұрын
I really enjoy these videos, they help so much hahaa keep it up!
@nadingad288
5 жыл бұрын
I really love your spirit in videos and very nice to meet ur channel ❤❤ thank you 😍
@moumitamallick5876
5 жыл бұрын
Very useful and informative video!
@sriyasmalling5165
2 жыл бұрын
I get confused somewhere at around 5:50. True of False - low pitches and low volumes result in slower and less dramatic vibrations of the auditory transducers. True? Why then or HOW would the lower frequency create more force or push on the cochlear fluid and basilar membrane?
@InteractiveBiology
2 жыл бұрын
That kinda sounds like a homework question. Are you trying to get me to do your homework for you? 😜
@aislinn845
4 жыл бұрын
Is a low frequency a high sound or low sound?
@harryps3
10 жыл бұрын
Quick question about the Cochlea, the diagram shows a range from 1600hz to 25hz, but we know humans have a hearing range from 20hz to 20khz. Is the diagram incorrect or is there a reason it shows the frequencies like that?
@sharonthornton8803
8 жыл бұрын
+harry the diagram doesn't show all of the frequencies and he does mention the hearing range in the video, notice how the line to where the frequency is 1600hz isn't at the end.
@A1904-h9j
9 жыл бұрын
Man, you really help me with your videos! Thanks a lot! :) Very very good job!
@violinsheetmusicblog
8 жыл бұрын
E = hf? energy is proportional to frequency? So why would lower frequencies be higher energy?
@victoriaegedus8075
7 жыл бұрын
I dont know, but he said lower frequency results in more Force, not energy per se?
@MultiOne4all
10 жыл бұрын
At 5:52 i was just about to start air drumming :D Great explanation btw , Thank you :)
@the7real7deal
12 жыл бұрын
Your videos are great!
@sarastevens1488
11 жыл бұрын
This is an awesome video! Why does the cochlea need that liquid, though?
@locustphysalis3300
6 ай бұрын
Excellent teaching
@InteractiveBiology
6 ай бұрын
Man, thanks so much, @locustphysalis3300. I try hard to break things down in a way that's understandable. So if you wanna keep learning like this, make sure to tap subscribe. Lots more great stuff coming.
@mrmanicma173
11 жыл бұрын
No. You're going to interpret it as a vibration and not as a sound. You're going to feel weird because your ear receives the vibrations, translate it to brain's signals, but your brain can't identify the signals. As a consequence your auditory system is acting like it's going to get information, but nothing happens. For example, when people think that they live in a haunted house, it's because the house is built in an acoustic manner in which the vibrations' frequency are under 20hz.
@mrcrescend066
11 жыл бұрын
feelin that bass, whats the name of the song?
@MrJacobOlson
12 жыл бұрын
did anyone notice that the second listening example didn't have any low frequency?
@dbgtvishnu
11 жыл бұрын
could you make some anatomy videos for mbbs students on dissection and rememberance notes
@neishajmoments
13 жыл бұрын
lolol..loved the beginning..lol.. && the 'let's continueee' the rest of the vid 2! very helpful..all of them..thnx!
@gurunathvenugopal4642
2 жыл бұрын
Very good Tutorial. Thank you very much
@InteractiveBiology
2 жыл бұрын
You're very much welcome.
@MusicIsMySoul334
4 жыл бұрын
This was a fun video not gonna lie XD Didn't think I'd enjoy learning about the ear so much haha
@user-xc5xf8gp8n
2 жыл бұрын
makes perfect sense. Thank you
@beccaproske6287
9 жыл бұрын
This was so helpful. THANK YOU!
@Ericanious
11 жыл бұрын
Best intro ever.
@dbgtvishnu
11 жыл бұрын
your good dude make such more videos its good for students
@mpg8839
5 жыл бұрын
What causes water to come out of the ear?
@wendybenson5785
9 жыл бұрын
Thanks for the video, it was great! Just wanted to ask if there is a specific reason the cochlea is coiled?
@usamaqamar5562
6 жыл бұрын
Wendy Benson ofcourse to occupy low space
@monsterjazzlicks
11 жыл бұрын
GREAT diagram @ 2:00.
@tipsandtricks148
7 жыл бұрын
good explanation
@EloveOzOn
10 жыл бұрын
You sir are the best. Keep up the good work
@monday2471
12 жыл бұрын
omg i laughed so hard at 0:37 when he started cracking up
@shaunorth3229
Жыл бұрын
Great video! Thank you!!
@InteractiveBiology
Жыл бұрын
You are very much welcome, Shaun. Glad you found it valuable. Make sure to subscribe to the channel, because I have a lot more content like this coming to help you with biology. I actually have another hearing video that I'm posting tomorrow.
@santoshraj1203
11 жыл бұрын
thank u for uploading sir...
@kathleenrobinson46
10 жыл бұрын
Is it possible to get a real life visual of the inside of the cochlea? Maybe through ultrasound? It would be so awesome to see the fluid inside the cochlea moving the hair cells.
@ILoveCountryBoys455
10 жыл бұрын
I don't know
@fransuasish5143
10 жыл бұрын
thank you for this upload
@hanifunny7
10 ай бұрын
God bless you i really needed this video
@InteractiveBiology
10 ай бұрын
God bless you too. Glad you found it helpful.
@TheAlphamale001
11 жыл бұрын
silly but fun and mad informative. thanks a lot
@Livinglifehigh
13 жыл бұрын
lol at the beginning. LETS CONTINUE! to make biology fun! (ur catch phrase b4 every video n_n
@flyzies
9 жыл бұрын
awesome stuff! you have a new subscriber
@kyriakospitsillos
10 жыл бұрын
nice bass
@mrkenda87
10 жыл бұрын
Awesome man
@DavitJibuti
11 жыл бұрын
good job bro,thank you
@yaraaziz4361
2 жыл бұрын
How does the brain make us hear that sound though ? Like the brain now knows if it is high frequency or low And it like interpreted all that information about the sound waves coming. Now how does it make us HEAR it ? Like Do you know what I mean ?
@InteractiveBiology
2 жыл бұрын
That's a great question that I wish I had the answer to 😉
@aspagoniq
10 жыл бұрын
waw! u explain it so well! all is so much clearer now! u should be a teacher! :)
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