1. In acoustics, for a specified signal, the minimum sound pressure level at the entrance to the external auditory canal which, in a specified fraction of the trials, will stimulate the ear to a point at which there is a sensation of feeling that is different from the sensation of hearing. Also called tickle.
     
  2. The sound pressure level that makes the ears tickle, located about 120 dB above the threshold of hearing.
    Source: http://www.owenscorning.com/around/sound/glossary.asp
[[Category: Acoustics]]