So if you watch TV you will sometimes see the KFC ad and in 1 of the ads you will hear a Mosquito Ringtone.
The 1st time I hear that I thart the TV was going out.
But I looked at up on google and it came up as a KFC Mosquito Ringtone ad
Google KFC search
And you can hear the tone at http://thefuntimesguide.com/2006/06/mosquitone.php