Noise Cancelling technology

[Outdated]

This was just an idea that popped in to my head, and like most ideas if you look on the net you'll find that others have already had the same idea. I was thinking about my noise cancelling headphones and how much of a god send they are, but the trouble is you can't sleep wearing them. So I wondered if you can get noise cancelling speakers to make a whole room quiet.

Yes, you can.

So now I'm wondering if any forum users have any experience with this technology and what their thoughts are.

Noise-Canceling Speakers for Rooms: A New Era of Silence – Gentle Hush

https://singersroom.com/music-gear/best-noise-cancelling-speakers/

 

[Angular Chap]

I tried this myself a while back. I did a few experiments in Audacity, generating tones and reversing the polarity on a second tone on the same frequency to phase out the noise and it does work.

The problem was, I couldn’t get it to work with the noise I was actually trying to get rid of in the first place. I was being plagued by the famous (or should that be infamous?) noise known as "The Hum." I generated a sweeping tone, then reversed the phase in Audacity. I couldn’t get it to work and now I know why: normal speakers only work properly within the range of human hearing and I can hear noise outside that range, which my speakers can’t produce and so couldn’t phase out The Hum because the frequency was too low.

 

[Outdated]

I tried this myself a while back. I did a few experiments in Audacity, generating tones and reversing the polarity on a second tone on the same frequency to phase out the noise and it does work.

This sounds exactly like what I was just looking for, if you could post a link to more information I'd appreciate it.

The only software I've found is for cancelling background noise when you're using a microphone online, not what I'm looking for. I share a wall with an alcoholic neighbour and I just want a break from the noise of his voice. Once he's had a few he just never shuts up. If it can cancel out doof doof music as well then I'll be even happier.