They are all transducers, devices that translate one form of energy into another. The operating principle is transduction.
What is the working principle of the Loudspeaker?
An audio signal source such as a microphone or recording produces an electrical "image" of the sound. That is, it produces an electrical signal that has the same frequency and harmonic content, and a size that reflects the relative intensity of the sound as it changes. The job of the amplifier is to take that electrical image and make it larger -- large enough in power to drive the coils of a loudspeaker. Having a "high fidelity" amplifier means that you make it larger without changing any of its properties. Any changes would be perceived as distortions of the sound since the human ear is amazingly sensitive to such changes. Once the amplifier has made the electrical image large enough, it applies it to the voice coils of the loudspeaker, making them vibrate with a pattern that follows the variations of the original signal. The voice coil is attached to and drives the cone of the loudspeaker, which in turn drives the air. This action on the air produces sound that more-or-less reproduces the sound pressure variations of the original signal.
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The OP's title question is answered by millercarbon and mijostyn, and blindjim is not wrong either. I would add: Different speaker designs exist because their designers saw different goals, and had different budgets and timelines, educations and hearing abilities. It is easy to be impressed with the technical details in a design and the dedication of its designer. Of course, this does not validate the science behind the design. Those with the requisite education know quite well the simple math ignored in so many designs, math also not known by reviewers or editors. Those designs turn out to be ones difficult to set up, and those that cannot play certain types of music. To keep research grounded in reality, one must state the desired goal and then always ask the right questions (and many wrong questions and figuring that out!). When designing a new speaker, we can agree the main goal is to get that complex waveform seen on a computer to be how our eardrums move in and out. Of course, that motion will be overlaid (not obscured) with room reflections and echoes, so we pull our speakers out and make our rooms 'not lively' To reach this goal, a good designer must describe his average listener--
Of course, consumers must rely on listening, which means also training their ears to listen for details important to the music. Go to live, intimate musical events of top-notch performers. Go often as possible to help train your ears. While we all have different abilities to hear into the music, we all benefit from conscious efforts to actively listen. Best regards, Roy Green Mountain Audio |
The OP plagiarized: http://hyperphysics.phy-astr.gsu.edu/hbase/Audio/spk.html And I've seen this post before, although it has since been removed. I'm not sure what the OP's game is. |
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