I think he is into Voyeurism

We have been together for almost 4 years and knew he some type of sexual disorder. But he was able to keep this hidden until I started working out of my home.
He had already slow sex down to once a month and moved into his own room and sleeps there most nights...after he would push a button so I will react and he then storms off to his own room, locking the door. I am then left confused on how that happened in 30 sec or less. I had figured out he was excessively masterbating from 11p to 7a. Then 5 weeks ago I realized he is quietly masterbating the the young lesbians that moved into the apartment next door a year ago (when he took his own room).
Because they heard me confront him loudly a few times...they now put on a nightly sound show for him, and webcam maybe involved.
Then I started recalling other simular events over the years.
He denies that he even masterbates....that I am the crazy one.
I'm exhausted ..... I can put in ear plugs...but I can't stop the bed shaking from the girls next door. And get wokeup 3 or 4 times a night at least 20 days of the month.
Does anybody know if this is voyurism?

Usually voyeurism usually involves a person who is watching some other person/s without knowledge they're being watched. If you think the couple has agreed to a web cam - this isn't voyeurism. The thrill of voyeurism involves the secrecy of watching without the persons knowledge. It sounds like he has a problem with excessive masturbation - he most likely does get off on hearing the couple next door. Is he addicted to porn? Have a nice calm talk with him - trying to shame him and accuse him won't help. Tell him that you would like him to get help regarding this problem and you would like the frequency of your sex life to improve. Best of luck

Sounds as though he is using sex as his drug of choice.... that which numbs him to the world and the feelings he is trying to hide from. I cannot say that he will change any time soon or that he even wants to change or seek help for his problem / addiction, but I would suggest that you think long and hard about your future with this man (or the lack of a future).