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Buzzer - Wikipedia
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Buzzer - Wikipedia
Website URL:
https://en.wikipedia.org/wiki/Buzzer
Category:
Stones
History Electromechanical. The electric buzzer was invented in 1831 by Joseph Henry.They were mainly used in early doorbells until they were phased out in the early 1930s in favor of musical chimes, which had a softer tone.
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