Often when diving in deep water, I hear strange unidentified sounds. Sounds unlike anything I hear at the surface. I want to record and investigate these sounds. These sounds are not loud enough to register on my camera's microphone, so I will need some specialized equipment. I will need a specialized device called a "Hydrophone". An underwater microphone. But these sounds are very weak so I will also need a LOT of amplification of these signals. But devices like these are way outside my budget. In college I was trained in circuit design and analysis, so this is a project right up my alley. What follows is my design and construction of a hydrophone capable of being lowered into the deepest parts of deer lake. a sensitive "electret" microphone element coupled to a home-brewed preamplifier, encased in mineral oil, on the end of a 100 foot shielded cable. at the surface a power amplifier and headphones. My design goal for the system is somewhere around 30dB. Like the Navy's underwater listening devices, you and I will be able to hear things from across the entire lake, which are normally inaudible to the human ear.
Let's get to it......
Негізгі бет Sometimes I hear Things - Hydrophone Project - 8/11/23
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