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A transducer can be made to project a narrow beam of ultrasound that is powerful [...]
Actual digital speaker driver technology not only exists, but is quite mature, having been experimented [...]
Piezoelectric transducers, frequently used as beepers in watches etc., are often used as tweeters in cheap speaker systems. [...]
A loudspeaker, or simply speaker, is an electromechanical transducer which converts an electrical signal into [...]
A speaker converts electrical energy to mechanical/acoustical energy. It uses a coil of wire, which [...]
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