2 ms·
Right, but the speed of sounds is slow. So things like placing a microphone 6 feet closer to the source allows for much more effective noise cancellation. Cur
by sliken 6y ago
Right, but the speed of sounds is slow. So things like placing a microphone 6 feet closer to the source allows for much more effective noise cancellation. Current tech in earphones skips that by using past noise as a prediction of future noise, and as a result only works on near constant noise of airplanes and other near constant sources of noise.
- avian 6y ago> only works on near constant noise of airplanes and other near constant sources of noise. That is simply not true - at least in my experience with an old model of Sony headphones. It's possible that prediction plays some role, but I bought mine with specific purpose of silencing neighbor's kids. They work really well with this kind of sporadic, random noise and the difference between turning on active cancellation and just passive attenuation due to ear muffs is very noticeable. I'm talking about low-frequency noises that are mostly transmitted through the vibrations in the walls and floors - feet hitting the floor while running, ball bouncing of the walls and so on.