organand the black key next above it simultaneously. Let the continuouswaveline (AB, Fig. 132) represent the waves caused by the white key Sound. 165 and the dotted line the waves caused by the black key. As both arestruck at the same time, their waves start together at A, but as the lowertone… … Fig. 132. hence the wavy, throbbing sound. The real sound as perceived by theear might be represented by the line XYZ in the same figure. A tone produced as above is a pleasing tremulo, as are many otherssimilarly produced by very low notes; but when the higher notes arestruck, the beats are so…
Physics
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
