Page 186 - Master Handbook of Acoustics
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FIGURE 10-2   An exercise to demonstrate the result of combining sine waves. (A) 500-Hz sine
   waves are displayed with delays of 0.1, 0.5, and 1.0 msec (conforming to the distributed spectrum
   cases in Fig. 10-4). (B) Combining sine waves such as these does not yield comb filtering, but
   simply other sine waves. A distributed spectrum is required for the formation of comb filtering. A
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