stridulate

sirittää puhekieltä To make a high-pitched chirping, grating, hissing, or squeaking sound, as male crickets and grasshoppers do, by rubbing certain body parts together.
1969, Vladimir Nabokov, Ada or Ardor, Penguin 2011, p. 191:

A window was open, and the crickets were stridulating at an ominous speed in the black motionless foliage.

The crickets stridulated their everlasting monotonous meaningful note.