These past two months i've constantly hearing a buzzing sound coming from my neightbouring apartment. It is a small complex and there is only three apartments and a shop on the lower floor so i know it's my neightbour.

It comes in the form of vibrations from his bedroom and it lasts all night long. It is extremely rithmic, most likely some form of machinery or electronic device.

Every 4 second there is a 2 second vibration.

I'm curious of what might be. He is kinda sporty and it's always out biking, so I don't see him much often.

Do you have any idea of what might be happening there?

I thought he might be using one of those breathing machines but a couple if times he was definitely having sex while this machine was active so I don't think that's the case anymore (yeah his bed was bumping on the other side of the wall and those times she was very pleased so some more intercourse sounds could be heard coming from his bedroom).