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December 2006
Ultrasonic Ringtones - The new ringtones that only kids can hear!
by sharing8
(via)
Can I hear these ultrasonic ringtones?
Find out just how far your ears can hear into the range of ultrasonic ringtones. Pretty much everyone should be able to hear the lowest tone (8kHz). Many people should be able to hear up to around 14.1kHz, from around 17kHz upwards we get into the range that only the under 20's can hear!
March 2006
September 2005
1
(3 marks)
