Instructable on Cricket Chirp

Is there a Instructable on how to do that cricket chirp with your mouth? I've seen other people do it and I really want to know how it's done.

linkmaster03 (author) 9 years ago
B00mp.
NachoMahma9 years ago
. The closest thing I could find is this.
linkmaster03 (author) 9 years ago
:o