What microphone can pick up sounds through a shared wall?
I live in an apartment with a shared wall with my neighbor, who seems to be very sensitive to noise and often bangs on the wall. I suspect that they might be using a microphone to listen to what is happening in my apartment, as they react even to very low whispers. I am curious about what kind of microphone they could be using and how it works. Is there any expert who can explain this to me? I appreciate any feedback.
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