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2. The Mosquito - Wikipedia

   en.wikipedia.org/wiki/The_Mosquito

   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 "Mosquito" for the buzzing sound it plays, the device is marketed as a safety and security tool for preventing youths from congregating in ...

3. Loudspeaker - Wikipedia

   en.wikipedia.org/wiki/Loudspeaker

   Loudspeaker. The hole below the lowest woofer is a port for a bass reflex system. A loudspeaker (commonly referred to as a speaker or speaker driver) is an electroacoustic transducer [ 1]: 597 that converts an electrical audio signal into a corresponding sound. [ 2] A speaker system, also often simply referred to as a speaker or loudspeaker ...

4. Electrostatic loudspeaker - Wikipedia

   en.wikipedia.org/wiki/Electrostatic_loudspeaker

   Electrostatic loudspeaker. Schematic showing an electrostatic speaker's construction and its connections. The thickness of the diaphragm and grids has been exaggerated for the purpose of illustration. An electrostatic loudspeaker (ESL) is a loudspeaker design in which sound is generated by the force exerted on a membrane suspended in an ...

5. Long-range acoustic device - Wikipedia

   en.wikipedia.org/wiki/Long-range_acoustic_device

   A long-range acoustic device ( LRAD ), acoustic hailing device (AHD) or sound cannon is a specialized loudspeaker that produces sound at high power for communicating at a distance. It has been used as a method of crowd control, which has caused permanent hearing damage, having an extremely high decibel capacity (up to 160 dB measured at one ...

6. Can you get a ticket for driving with really loud music ... - AOL

   www.aol.com/news/ticket-driving-really-loud...

   Friday and Saturday: 8 a.m. to 11 p.m. at 85 decibels and 11 p.m. to 2 a.m. (the following day) at 60 decibels For reference: 60 decibels is as loud as a business office , including normal ...

7. One of the world’s tiniest fish can make noises louder than ...

   www.aol.com/one-world-tiniest-fish-noises...

   It’s louder than a flightless kakapo’s mating call, which reaches 130 decibels, and an elephant, which can up to 125 decibels with their trunks, according to museum officials. The males of the ...