Tyndall, John, 1820-1893 · New York : Appleton · leaf 93
o a state of periodic motion. A stretched stringpulled aside and suddenly liberated imparts vibrationsto the air which succeed each other in perfectly regularintervals. A tuning-fork does the same. When a bow isdrawn across the prongs of this tuning-fork, Fig. 20, theresin of the bow enables the… … to start back once more as soon as its resistance becomesgreat enough. This rhythmic process, continually re-peated during the passage of the bow, finally throws thefork into a state of intense vibration, and the result isa musical note. A person close at hand could see thefork vibrating; a deaf…
Sound
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