Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 78
tion.\Yhen the tnning-fork is first excited the sound issuesfrom it with maximum loudness, becoming graduallyfeebler as the fork continues to vibrate. A person closeto the fork can notice at the same time that the ampli-tude, or space through which the prongs oscillate, becomesgradually less and… … ^^^ changes, the rate of vibration remains the same. Pitchand intensity must therefore be held distinctly apart: thelatter depends solely upon the amplitude, the former solelyupon the rapidity of vibration. This tuning-fork may be caused to write the story ofits own motion. Attached to the side of…
Sound
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