Get a cheap subwoofer and play a sound just below the frequency humans can hear on a medium or high amplitude. Your normal hifi speaker should be enough too. P

Get a cheap subwoofer and play a sound just below the frequency humans can hear on a medium or high amplitude. Your normal hifi speaker should be enough too. Put it at the wall of your neighbor for a few days. Most people will feel nausea, vertigo or unwell in general. Great for evicting unlikable neighbors.