Mar 03, · 17, Hz is the frequency only teenagers can hear! Most people over 18 should not be able to detect this sound. Some major retailers actually use this science to keep teens Author: Laura Kenney.
Jul 24, · Many people under 25 can hear up to the 14 kilohertz or 15 kilohertz tones. As you get older, though, it all starts sliding downhill. The good news is that those high tones Author: John Donovan.
Jun 13, · A ring tone many adults can't hear. Dubbed the Mosquito, the noise stems from an antitheft technique in the United Kingdom, where it was used to deter youth crimes such as shoplifting. The idea is that most adults lose the ability to hear high-pitched sounds as they grow older, so this tone will reach the ears of only the eccpasa.infos: A ring tone many adults can't hear.
Apparently, there's a noise that only people under 25 can hear.