Mosquito Ringtones for Mobile Phones
This is maybe the most interesting and somehow surprising kind of all ring sounds nowadays, created by Howard Stapleton. He usually explains that only a few people over age 30 can hear this specific "Teen Buzz", resembling the sound of the mosquito. Thus, it becomes a popular ringing and was hijacked from a security technology that was originally used to repel loitering teenagers from shops in the United Kingdom. Inventor Howard Stapleton has probably developed his "Mosquito device" for the Compound Security Systems. It emits a modulated 17 kHz sound that proves to be a great annoyance to teenagers or anyone younger, but leaves unaffected people over twenty years of age. This is due to presbycusis, a normal loss of acute hearing that occurs with advancing age. "Teen Buzz" was developed using the same technology, but as a constant 14,4 kHz high frequency ring sound. It is occurred to be most convenient in the classroom, allowing students to be alerted of incoming text messages on their mobile phones without the knowledge of their teachers. Stapleton is impressed and admits to this idea being humorous, but he thought it might also be a bit infringement on his intellectual property rights. The basic principle behind "Teen Buzz" is a biological reality that hearing scientists can refer to as presbycusis, or aging ear. Starting at around age 20, they explain, that the human ear loses its ability to hear tunes in the highest human-range frequencies - 18-20 kHz, and as one ages, it becomes more difficult to detect these sounds. Most adults over 40 or 50 seem to have the main symptoms of this condition, but younger adults usually are not affected, as most human communication takes place in a frequency range between 200 and 8,000 hertz, leaving the deterioration of the ability to hear frequencies higher than that undetected. There are lots of exceptions though, as some adults even over the age of 45 can hear the specific "Teen buzz".
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