As many times as I've held a cockroach up to my ear
As reluctant as I am to admit in a public forum the depths of morbidity to which my curiosity can sink, I find myself compelled to speak on behalf of all the other readers who are also wondering just how many times that would be. 
In addition to the standard "Ewwww" factor, a group like this one is also faced with all the images from science fiction of insect(oid)s being inserted in people's ears to subjugate them to the will of the new alien overlords (Assuming I could actually hear anything over the cocking of the pistol being held to my other ear, I would half expect the bug to make a noise that sounded like "rich Corinthian Leather"...), so the very existence of your experimentation seems all the more remarkable.
Inquiring minds want to know. Sorta...
Ran