Jayarava: Hm. I have always ceneidsrod hair cells to be sensory neurons. Dave: The last paragraph may be my mangled interpretation of the authors' hypothesis. The 300 cycles was a convenient random number. I just picked to try to illustrate what I thought the authors were hypothesising: the advantage of the high frequency is reaction time.As for traffic, it could well be. There probably is research on what kinds of sounds trigger moth behaviour. I'm not sure whether continuous ultrasound would do it.Thanks both for the excellent comments!
