Mondo Knows Facts
The moving coil loudspeaker arrived in 1925
Chester Rice and Edward Kellogg described the design still used in most speakers A coil in a magnetic field drives a cone that moves air, converting a signal into pressure waves. Their paper covered the problems that still limit designs today. Radio and cinema created the demand that made it standard. It sits in Mondo's music collection, one of 200 facts that each trace back to the reference below.
Where this comes from
Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.
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Tags: speakers, history, inventions
The moving coil loudspeaker arrived in 1925: the short answers
- Where does this come from, and can I check it?
- Chester Rice and Edward Kellogg described the design still used in most speakers. The figure is taken from Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
- Is this really a music fact?
- Yes. It sits on the Music shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
- What else can I read about it?
- The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.