Audio Amplifiers

ALSO CALLED: Stereo Amplifiers, Amplifiers, Amplifier
DEFINITION: The Mosquito is a device that creates a high-pitched noise like an amplified version of its namesake. Inventor and security expert Howard Stapleton created the device, a 9-inch black box which creates an 80- decibel pulsing frequency with an effective range of 15-20 meters. The device is intended to prevent youth from congregating around convenience stores and other places where loitering has been  … 
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AUDIO AMPLIFIERS DEFINITION (continued): …  problematic.Most mature adults are unable to hear the sound although it is clearly audible and, according to reports, highly annoying to most teenagers and children. Ingenious teens have since turned the ultrasonic sound to their advantage, by creating a ringtone that can alert them to text messages undetectably to adults -- including teachers and parents. The ringtone version of the mosquito has been called "Teen Buzz."When the Mosquito teen repeller was tested at a convenience store in South Wales, here's how one teen described the sound: "It's loud and squeaky and it just goes through you." … 
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