Acoustic Waves Generated by a Loudspeaker

A loudspeaker converts electrical energy to accoustic (sound) energy generated by an electromagnet in a magnetic field. The electrical current flowing through the coil oscillates between 20 and 20000 times per second (Hz). This causes the diaphragm—a paper cone attached to a metal frame called the basket—to vibrate, thus generating the acoustic waves.


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[1] Wikipedia. "Loudspeaker." (Mar 28, 2012)
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