Seems like some people got you confused. Sibilance do sounds like a snake's hiss, for an e.g.; an emphasized 's' sound when the vocal says anything with an 's'. However hiss in audio is not sibilance. While not exactly the same, a hiss is somewhat similar to a pink noise(you can google for one); and is a background noise i.e. something that 'plays' all the time, when there really shouldn't be any.
10/25/11 at 12:43am