3 ms·

Isn't the inverse of a sound the same sound?

• noir_lord 7y ago
  Nope, it's flipped on the horizontal axis (if you picture it as a graph) so when both are summed you get zero (at least in perfect destructive interference).
• bzbarsky 7y ago
  It's the same sound, but out of phase, so they cancel out. Think operating principle of noise-canceling headphones.