Consider the two waves shown in Fig. 12-31. Each wave can be thought of as a superposition of two sound waves with slightly different frequencies of two sound waves with slightly different frequencies, as in Fig. 12-18. In which of the waves
(a) Or (b) are the two component frequencies farther apart? Explain.

-1 (s) 0.15 0.05 0.2 -1 -2+ (a) I (S) (s) 0.15 0.05 0,1 -1 (b)