Sibilance, is the trebley high end distortion that results when a singer pronounces "SSSS" sounds.......again can be slightly improved with the old tights & wire coathanger, but not as much as the Pop's....(See "Pop")
A hissing sound produced when pronouncing S and Z. Sibilance is undesirable in professional sound reinforcement and can be controlled through the use of a "de-esser" like Valley Audio's 401 Microphone Processor, 815 Dynamic Sibilance Processor, or 730 DynaMap Digital Dynamics Processor.
Voice recordings often contain excessive loudness of the voice sibilants, and this effect is sometimes called sibilance. The most difficult sibilants to reproduce accurately are the sounds "s" and "sh". This effect is reduced by the use of a de-esser.
The presence of strongly emphasized s, sh, ch, z, j sounds in speech called sibilants. These consonants are created by air moving through the vocal tract and being constricted by the position of the tongue and lips.