This is the first time I am using this Forum. Can someone please help me with how to make waterproof a microphone(dynamic)connected with Arduino? I can't afford to buy a hydrophone. I don't have time to build one either. I am thinking maybe an airtight box and sealing the holes with epoxy. But my main problem is I am not sure if the signals are able to get out through the box? I am also going to do the same with the sender speaker and Arduino so I can try it underwater sender-receiver project. Please share if anyone has any solution. Thanks!
How about sealing a microphone in a box filled with oil?
(Don't know, never tried it)
It's going to change the characteristics of the device, but the coupling should be better
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In World War Two they improvised hydrophones by putting a microphone in a condom and tying a knot it it to make it water tight..
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OT - there's a book called "Churchill's Toyshop" documenting the SOE's workshops where a lot of booby traps, sabotage devices and special weapons were developed.
Early limpet mines used aniseed ball sweets as safety timers (they dissolved slowly in water), and were kept dry in ... condoms.
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