Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 239
simultaneously the lowest note of a piano andits sharp (black key next above), and listen to the resulting sound. You hear a peculiar wavy or throbbing sound, caused by analternate rising and sinking in loudness. This phenomenonis still more conspicuous where the two lowest adjacent notesof a large… … Fig. 180. dotted line a series of waves proceeding from the upper key.Now the waves from both keys may start together at A ; butas the waves from the lower key are given less frequently, soare they correspondingly longer ; and at certain intervals, asat B, condensations will correspond with…
Physics
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