Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 745
ssthan for the fundamental are easily noticed. (b) Records of jMusical Notes. In Figs. 8, 9 and lo are shown records of the flow of currentin an ordinary telephone microphone when an open organ pipewas blown near the microphone. They are thus approximatelysimilar to the wave form of the notes given… … Fig. 10 shows the octave and double octave of the fundamentalnote of the pipe. Fig. II is a record taken when the pipe was very stronglyblown and giving a variety of overtones, the most rapid of whichis 904 vibrations per second. The great regularity with which vibrations repeat themselvesis not to…
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