Thank you guys for your hints!
I will read through them, if one seems good for my purpose, i will try it and if it works, i will send the 0.2BTC.

The purpose should be to send a loud noise to the neighbours that only they can hear.
Or to disturb their speakers.
I can see their Sat antenna. From me to the antenna it is about 8 meters. Maybe i can
kill the lnb with a laser or something?

Your (sick) ideas are welcome.

Will still spend 0.2BTC for hints.

It's the flat next to mine, so one side of my flat is wall-to-wall to the neighbours flat.
Its a flat over 2 floors. At one side both 2 floors are wall-to-wall to the neighbours.

I also thought about a woofer but you will hear it in the whole house.

Does anyone know a forum or a site where i can get ideas?

It's about the flat next to me. The crack addicted neighbours turn their music and TV so loud my children can't sleep well. Talking with them didn't change anything. Police doesn't care.

Any other idea? Maybe i can disturb their electronic devices or the satellit signal or something else?

I need a device that can send a loud signal/sound through a concrete wall.
This sound should only be hearead at the other side (receiver side). On the sender side it should not be heared.

I will give a reward of 0.2 BTC for a reference where i can get such a device or how i can build it.

Hi, does anyone know a marketplace or forum where i can pay freelancers with bitcoin?

Hi, i am new here.
I am searching a service like twago that accepts Bitcoin.
I hope you have some ideas.
Thanks in advance!