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Is loudspeaker a motor or a generator?

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  • Anonymous
    2 years ago

    Technically, it's actually a solenoid rather than a motor or a generator. Motors and generators would have a rotating motion, rather than a linear motion which is what a solenoid has. But a loudspeaker would be conceptually closer to a motor because it takes electricity and turns it into motion. The opposite of a loudspeaker would, of course, be the microphone, which takes motion and converts it into electricity, which is conceptually closer to a generator.

    • Robert J
      Lv 7
      2 years agoReport

      Never heard of "Linear motors" ??

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  • M.
    Lv 7
    2 years ago

    It could be both, I guess.

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  • 2 years ago

    Grenade

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  • 2 years ago

    Silly question. It is neither. No-one in their right mind would consider a loudspeaker as a motor, or as a generator. They are essentially defined by the output which they produce : a motor produces usable work, a generator produces the power which is required to make the motor work.

    A loudspeaker is a transducer (that is, it converts energy from one form to another) : or, if you like, simply an amplifier (which converts a weak signal of some kind into a strong signal of the same kind). It uses feeble electric currents to produce movement in a diaphragm which generates sound waves (but that is a different use of the word "generate" (verb) to the meaning of "generator" (noun), which specifically applies to a machine which produces that useful work).

    Motor, generator, and transducer, all denote particular kinds of machine, each with a particular purpose. A loudspeaker does not meet the conditions in the definition of a motor, or a generator.

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  • 2 years ago

    Both - either.

    They are normally used as motors, converting electricity to motion.

    However, they also function as moving coil (dynamic) microphones; working as a generator & converting motion to electricity.

    They are not very efficient for that and very low impedance compared to most mics, but with an appropriate input circuit or matching transformer they can work acceptably well.

    eg. Some small intercoms use the speakers for microphones as well.

    Example:

    http://circuitsgallery.blogspot.co.uk/2012/12/Simp...

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  • A motor. It uses electricity to cause motion in a diaphragm which gives rise to sound waves. A microphone is a generator. It uses sound waves to cause motion in a diaphragm used to induce an electric current in a coil. In theory, they are basically the same machine and their roles could be reversed. A small loudspeaker is sometimes used as a microphone in some applications and a microphone is electrically not much different to an earpiece.

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  • 2 years ago

    motor

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