Question

In this section assume the sound speed in air is 343 m/s.
A goose flying toward you at 12.6m/s emits a squawk, which you hear at 258Hz .

A)Find the wavelength of the sound you hear

B)Find the wavelength of the sound you hear if the goose emits the same squawk while flying away at the same speed?
A. L = V/F = 343/258 = 1.33 m.

B. F = ((Vs+Vr)/(Vs-Vg))*Fo = 258 Hz
((343+0)/(343-12.6))*Fo = 258
(343/330.4) * Fo = 258
1.0381Fo = 258
Fo = 248.5 Hz=Initial Freq. of the goose

F = ((343-0)/(343+12.6))*248.5
F = (343/355.6) * 248.5 = 239.7 Hz When
flying away.
B. L = V/F = 343/239.7 1.43 When flying away.

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