EXAMPLES FROM THE WEB FOR CHIRR
They have peculiar notes like a clear whistle, and a “chirr, chirr!”
The cricket's chirr and the occasional affirmations of the katy-did were the only sounds she heard.
But on leading up his horse within ten or twelve feet of the pin, it gives a little "chirr" and dives down out of sight.
"Not at all," replied the little man, in a voice as dry and crisp as the chirr of a grasshopper.
c.1600, echoic of a grasshopper's trill. Related: Chirred; chirring.