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What is the 'Mosquito tone' used to deter teenagers?
17.4 kHz
What is the 'Mosquito tone' used to deter teenagers?
The Mosquito tone is a 17.4 kHz high-pitched sound most adults over 25 cannot hear. It was commercialised as a device to deter teenagers from loitering. The science is valid: age-related high-frequency hearing loss means the tone is genuinely inaudible to most adults. Teenagers repurposed it as a secret ringtone in school.
Source: Established audiology; Compound Security Systems (2005)