You do not know of what you speak. It does not add sound pressure. Reducing sound pressure is the physical mechanism by which it operates. The inverse sound mea

You do not know of what you speak. It does not add sound pressure. Reducing sound pressure is the physical mechanism by which it operates. The inverse sound means that both sounds literally no longer exist. > prevent your perception of sound. No. It is destructively interfering with the wave. You don't perceive it because there is no more sound, not because of some perceptual trick. (For any pedants looking on, I'm ignoring the fact that the cancellation may be imperfect. Unless there's actually constructive interference going on -- which is not what delinka is saying -- there is plain and simply less sound.)