Loudspeaker
A vibrating diaphragm converts an electrical signal (or electrical impulses) into sound waves. In the process, the vibrating diaphragm excites air particles to vibrate. These in turn perform oscillations around their rest position. This means that the sound wave merely transports the energy of the sound.
In a loudspeaker cabinet, several diaphragms for different frequency ranges can now be coupled via a crossover to achieve a more harmonious and wider frequency range for the listener. Passive loudspeakers use a central amplifier, while active loudspeakers work with decentralized amplifiers (one amplifier per loudspeaker unit).
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