The Mosquito
Videos
The Mosquito or Mosquito alarm is a machine used to deter loitering by emitting sound at high frequency. In some versions, it is intentionally tuned to be heard primarily by younger people. Nicknamed
A Mosquito device mounted outside a store in Philadelphia
Acoustic harassment device
Videos
Acoustic harassment and acoustic deterrents are technologies used to keep animals and in some cases humans away from an area. Applications of the technology are used to keep marine mammals away from a
The Mosquito
…and the government has no plans to do so." The English county of Kent has chosen not to allow the usage of the Mosquito on council-owned buildings. Acoustic deterrent Presbycusis, the age-related hearing loss…
An acoustic pinger (active sonar) used to repel cetaceans (including dolphins and porpoises) away from fishing nets
Law enforcement officer holding a Hypershield, an acoustic hailing device used for crowd and riot control
One use of LRADs (long range audio devices) is deploying them to prevent people from entering line of fire areas