30 Philadelphia parks are equipped with tiny speakers that emit an ear piercing ring once curfew starts. The sonic technology called ‘The Mosquito’ is used for repelling insects, but is just as effective on young ears.

Most adults, mostly over 40 cannot hear the sound…some can though.

Some towns are using it to deter teens from violating curfew too.

I must warn you, it may be nails across a chalk board for the younger kids!

Can you hear it??