Mar 03, 2015 · Did you know that, as we age, we can no longer hear certain high-pitched noises as well as we did during our youth? There are sound frequencies that only Author: Laura Kenney. The original ultrasonic ringtone high frequency hearing test. Can I hear 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.
May 26, 2006 · Teens Turn 'Repeller' into Adult-Proof Ringtone Shopkeepers in the United Kingdom have been using the ultasonic Mosquito teen repellent to . Download free mosquito ringtones, the ultrasonic ringtone also called Teen Buzz that adults can not hear. This special frequency tone is inaudible to those over the age of 30, now you can get calls and text messages in class without your teachers knowing it.
Why can't adults hear high frequency ring-tones? Adults usually can't hear above 12,000 Hz so this is why the teenagers use a ring tone of 13,000 Hz while in school. The teachers can't hear it. Dec 03, 2006 · NEW YORK Jun 13, 2006 (AP)— Students are using a new ring tone to receive messages in class, and many teachers can't even hear the ring. Some students are downloading a ring tone off the Internet that is too high-pitched to be heard by most adults.Status: Open.