Excuse me for wrong grammars etc, English is not my first language and I assume deepl is not enough to fix mine

I’m in a wired situation. For the past month, I suspect that my neighbor living the floor above me is stalking me, but I can’t quite figure out how it’s being done. He makes many noises including hammer-hitting noises through the walls or ceiling when I’m home, and he makes that exactly at the spot I am and when I move he follows me. He knows the location of my bed and when I sleep, he woke me up every night and when I moved to another room and another time to sleep he followed me and woke me up. It’s bad for health so my friend is helping me, I go to my friend’s house at night and sleep there. He reacts to very small sounds like sound of my keyboard and mouse, very small stepping sound. He reacts for example by making simillar sound(like if I move from room A to room B he exactly follows me making big stepping noise). He even follows to toilet, and when I urinate, he slams the wall when I finish it and the sound of urine falling stops. My room’s light switch makes electric “boop” sound, he slams the wall very hard when he hears that.

About this being sound like severe mental illness, I talked this with my family, and they were very suspicious of me understandably, so I did a experiment, placing multiple recording devices in my rooms and the hammer-slamming noise happened exactly where I am, when I am, especially when I am sleeping(I changed the room and time of sleeping every day during experiment)

About calling police, in my country, they are well known for being useless, many people even lost life due to their ignorance. I’m not going to explain this to them for the sake of my blood pressure

It’s been long and I adapted the situation and having fine life, he still stalks me and make noises but I can ignore that. I’m not getting much stress because my body is very eager to severe stomach illness when I get stress but I’m not experiencing that. Most of all I’m moving to another house in months so it’s bearable. To be honest if he is going to waste time following me all the time let him do.

What I’m curious is how is he doing that. If he is living below my floor I might have understood because for example he is listening my footsteps but he is living above me, how he can track me real-time?

What I thought is

1.He has very good ear and maybe using some sound devices to Amplify sounds

2.He has made some holes in my room and placed cameras(there were drilling sounds on the ceiling of my room and walls by my neighbour, many times)

3.He has made some holes in his floor and walls, and through it inserted sound device with wire or blooth and placed it in many points behind my ceiling and walls(there’s some space in walls of my apartment)

4. simillar to 3 but instead of sound devices he placed some camera that can see through walls?(but does such cameras exist? if infrared cameras can see through thin walls I think there’s chance because my walls are pretty thin)

5.He has placed some devices that can catch sound or vibration below my floor(due to structure of my apartment there’s empty space used as kind of hall? lobby? below my house, and if he is really devoted to do something to me he can use ladder to go into space between the ceiling of the empty space and my floor)

About 2 I checked my room’s ceilings and walls a lot but I found no holes or lens. (if it’s infrared camera placed on the other side of wall an no holes. I might have missed though,

And about hacking, the only device that has camera and mic is my iphone and imac. I think the chance of my iphone hacked by an indivisual is very low and same for my imac. And it’s camera is covered and anti-virus software is installed.

What do you think it is that he is using to track me down?

Thanks for reading long and terrible text :)