Who invented the first speaker?

The first form of loudspeaker came about when telephone systems were developed in the late 19th century. But it was in 1912 that the loudspeakers really became practical – in part due to the electronic amplification by a vacuum tube. In the 1920s, they were used in radio, phonographs, public address systems and theater sound systems for spoken films.

What is a speaker?

By definition, a loudspeaker is an electro-acoustic transducer that converts an electrical audio signal into a corresponding sound. The most common type of speaker today is the dynamic speaker. It was invented in 1925 by Edward W. Kellogg and Chester W. Rice. The dynamic speaker operates on the same basic principle as a dynamic microphone, except in the reverse direction of producing sound from an electrical signal.

Smaller speakers are found in everything from radios and televisions to portable audio players, computers and electronic musical instruments. Larger speaker systems are used for music, sound reinforcement in theaters and concerts and in public address systems.

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