Page 32 - Master Handbook of Acoustics
P. 32
FIGURE 1-9 A study in the combination of sine waves. (A) The fundamental of frequency f . (B) A
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second harmonic of frequency f = 2f and half the amplitude of f . (C) The sum of f and f obtained
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by adding ordinates point by point. (D) A third harmonic of frequency f3 = 3f and half the amplitude
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of f . (E) The waveform resulting from the addition of f , f , and f3. All three components are in
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phase; that is, they all start from zero at the same instant.
The sine wave with the lowest frequency (f ) of Fig. 1-9A is called the fundamental, the sine wave
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