Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 89
ch of the7000 strings has a nerve to the brain. Here it affects itsown particular brain cell, thus making the person consciousof a sound. After many similar experiences the person isable to recognize a sound and distinguish it from othersounds. If sounds of different frequencies come into the ear,… … Figure 59. — Reenforcement, Interference, and Beats Illustrated. quencies, they will reenforce one another at times, andinterfere with one another at other times. Figure 59 shows two waves of different frequencies start-ing out together. At a they are making condensations andrarefactions at the…
Physics
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