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Ultrasonic transducer - An ultrasonic transducer is a device that converts energy into ultrasound, sound waves above the normal range of hearing for humans. While technically a dog whistle is an ultrasonic transducer that converts mechanical energy in the form of air pressure into ultrasonic sound waves, the term is more apt to be used to refer to piezoelectric transducers that convert electrical energy into sound.
Elma Center, New York - Elma Center is a hamlet (and census-designated place) and located in the Town of Elma in Erie County, New York. As of the 2000 census, this community had a total population of 2,491.
Ultrasonic inspection - In ultrasonic testing, ultrasonic waves of frequencies ranging from 0.5-15MHz and occasionally upto 50MHz are used to detect flaws.
Elma Township, Ontario - Elma Township is a township in northern Perth County, Ontario, Canada. Elma is located southwest of Wallace Township and northeast of Logan Township along the Huron County border.
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