Sorry if this is the wrong subreddit, please re-direct me to an appropriate subreddit.

My partner and I have been living in our new apartment for a few months now, and we’ve had a recurring issue with our neighbor on the other side of the shared wall. They seem to be incredibly sensitive to noise, and they’ll bang on the wall for the slightest sound.

At first, we thought it was just a matter of thin walls and a lack of tolerance, but things have taken a strange turn.

Recently, I’ve been experimenting a bit by whispering some not-so-friendly phrases when I come home from work or relaxing in the living room with my girlfriend, and almost like clockwork, there’s a loud bang from the other side of the shared wall. It’s got me wondering if my neighbor might be using some sort of microphone setup to monitor noise in our apartment.

Has anyone experienced anything similar, or does anyone have suggestions on what type of microphone could be used in this situation? I’m genuinely curious and a bit puzzled.

Thanks for any input!