Building a underwater microphone

Building instructions to build a piezo underwater microphone.

The Idea is to create underwater microphone to record sound with an XLR connection.

Construction images

The XLR Cable pinout.
The microphone with the copper foil shield connected to the XLR cable shield.
Adding some metal screws as weight to keep the microphone under water.
Finaly after glueing the piezo the complete microphone is sealed with rubber seal to protect it against sea water.

Link to audio examples from the underwater microphone recoded with the Zoom H6 recorder on a sunny day in march 2023.

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