To figure out the truth behind why mosquito ringtones work, actually it all boils down to the fact that people get old. That is basically the only reason youths are able to get away with mosquito ringtones, because they have fresher and younger hearing than their adult counterparts.
The simple scientific explanation of why mosquito ringtones work, is because studies have proven that most adults over the age of 25 are no longer able to hear sounds that are emitted at a pitch higher than 15 KHz. However, their younger counterparts, have hearing that has not deteriorated yet to the same level, therefore they can still hear the mosquito ringtones just fine.
Now you are probably wondering why anyone would ever use this discovery to invent the mosquito ringtones to purposely allow teens to scheme around adults, well it wasn't on purpose. The scientific loss of hearing in adults was first put to use to actually annoy teenagers believe it or not.
George Stapleton was a German researcher or a security company who used this useful fact to annoy teenagers so much they would move on from the businesses his security company guarded so that their loitering was solved without actual guard power. Since the adults could not hear the high frequencies, they could continue working in peace, but the pesky teenagers would eventually get annoyed by the high pitches they could still hear and wonder away from the areas.
Unfortunately for school teachers and parents, someone discovered the idea and twisted it to become the popular mosquito ringtones that are making their circles around the Internet today. You can practically go anywhere and try out the sample mosquito ringtones for free, testing them on adults and youth, and guess what, mosquito ringtones actually work. So if you are under the age of twenty five and want to be able to hear your text message alerts and phone calls so that you can excuse yourself from lecture or class, you are set for a few more years of your life, as the professors will never know.
Since it is impossible for adults to know if you are using mosquito ringtones, if you are a teen reading this, be sure to still exercise proper discern when using the mosquito ringtones. Airports and hospitals are still no place to use cell phones as they can disrupt signals and threaten lives, so even if you have mosquito ringtones, still turn them off.