Source : Webster's Revised Unabridged Dictionary (1913)

Stridulation \Strid`u*la"tion\, n.
   The act of stridulating. Specifically: (Zo["o]l.)
   (a) The act of making shrill sounds or musical notes by
       rubbing together certain hard parts, as is done by the
       males of many insects, especially by Orthoptera, such as
       crickets, grasshoppers, and locusts.
   (b) The noise itself.

   Note: The crickets stridulate by rubbing together the strong
         nervures of the fore wings. Many grasshoppers
         stridulate by rubbing the hind legs across strong
         nervures on the fore wings. The green grasshoppers and
         katydids stridulate by means of special organs at the
         base of the fore wings.

Source : WordNet®

stridulation
     n : a shrill grating or chirping noise made by some insects by
         rubbing body parts together