Our hearing ability ranges from 20 Hz up to 20,000 Hz. As we get older, the 20 kHz upper limit decreases. This phenomenon is medically known as presbycusis. Therefore, it is possible to generate high frequencies that are audible only to teenagers. Since these high pitched sounds are uncomfortable to withstand, they can be used -for example- to repel loitering teenagers in the street, as in the case of street-drinking parties, popularly known in Spain as botellones. In contrast, these sounds are also used as ringtones by a considerable number of youngsters who don't want their incoming calls to be detected by their teachers.
If you can hear this mosquito sound, it means you either are young or your ears are still in very good condition. So press PLAY and tell us about your experience!
Well, there seems to be a problem with the previous recording because even I can hear the noise, so now I'm including this second test which I'm sure most people won't pass. Turn on your loudspeakers and clean the wax off your ears. Ready? Here we go again...
Well, there seems to be a problem with the previous recording because even I can hear the noise, so now I'm including this second test which I'm sure most people won't pass. Turn on your loudspeakers and clean the wax off your ears. Ready? Here we go again...
