Can you hear it?
Applications are being developed for a 17 KHz sound that young people can hear but adults can’t. Apparently by about 25 we lose the ability to hear such high-pitched sounds.
It started out as a deterrent for shops etc. to play loudly and discourage teens from loitering. Then in a canny turnaround it was marketed as a mobile phone ringtone for teens to hear their phones ringing without parents or teachers knowing…. And it’s now been turned into a dance track with two levels of melodies.
Secret alarm becomes dance track from BBC News
Whatever next?
BTW I can’t hear it (well over 25). Can you?
Listen to the tone (link is to the wav file at Jet City Orange).