A loud speakermakes the sounds that come from record and cassette players, radio, and television sets. Inside teeh loudspeaker is a cone of a material such as plastic. It is connected to a coil or wire and a magnet. when an electric signal is fed to the loudspeaker, the magnet makes the coil move. The cone vibrates and the sound comes out.
When the electric signal is fed to the coil, it produces a varying magnetic field. A magnet placed aroun it atracts ad this repel the coil, which in turn vibrates the loudspeaker cone. The cone and its coil and magnet are known as a drive unit. Many loudspeakers have several drive units. Large units produce deep sounds and small units give high sounds.
In an electrostatic loudspeaker a plate is made to vibrate by electrostatic forces and not by magnetic fields.
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| Author: Moncy 18 Feb 2008 | Member Level: Silver Points : 1 |
is it the same principle for headphones
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| Author: Prasad 18 May 2008 | Member Level: Gold Points : 2 |
Most useful information
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