British newspapers described the first use of the high-frequency ring tone on May
2006 in ... is a cell phone ring tone that is too high-pitched for most adults to hear.
... Heard by an almost 35 yr...
Aug 3, 2009 ... The short version, A tone outside the audible range of hearing for most ... the ultra
sonic frequency and converted into to a cell phone ringtone ...
Jun 13, 2006 ... High-pitching ring is beyond hearing range of most adults -- but not of most
Mar 19, 2010 ... I didn't. Another cell phone went up and, again, I didn't hear anything. ... really
worked as advertised: Kids and teens can hear it but adults can't.
Jun 12, 2006 ... For classrooms where cellphone use is forbidden, students have found a ring
tone that many adults cannot hear.
... hear. This special frequency tone is inaudible to those over the age of 30, now
you can get calls and text ... The Ultrasonic Ring tone ADULTS CAN'T HEAR!
This means that they can only be heard by kids and generally can't be heard by
adults over the age over 20 or so. See this article at the BBC to find out more. ...
Pretty much everyone should be able to hear the lowest tone (8kHz). Many
people should be able to hear up to around 14.1kHz, ... Download to Phone/PC. -
, 10kHz ...
May 26, 2006 ... But now, teens are using the high-pitch frequency that most adults can't hear as a
text message alert while they're in class -- where they're not ...
if any teacher worth their salt finds a student with a cellphone fixed to thier ear
when ... I can hear it when it's on vibrate so they up me by using a different tone.
However, when your phone "rings" everyone in the class is going to hear it and at
... and might even catch on to you having a silent ringer on your cell phone.