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loudspeaker
Creating speakers with ultrathin graphene technology
stereophonic high-fidelity record player
Understanding wave interference through sound experiments
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loudspeaker
loudspeaker Four-way loudspeaker.

loudspeaker

audio instrument
Also known as: speaker
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Britannica Editors
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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•History

loudspeaker, in sound reproduction, device for converting electrical energy into acoustical signal energy that is radiated into a room or open air. The term signal energy indicates that the electrical energy has a specific form, corresponding, for example, to speech, music, or any other signal in the range of audible frequencies (roughly 20 to 20,000 hertz). The loudspeaker should preserve the essential character of this signal energy in acoustical form. This definition of a loudspeaker...

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