Question

question 23 of 28 what happens to sound waves when the source of a sound is moving toward you? a. wave speed decreases. b. wavelength increases. c. amplitude decreases. d. frequency increases.

Explanation:

When a sound source moves toward an observer, the Doppler effect causes the observed frequency to increase due to wave compression. Sound speed in a medium is constant, so wavelength decreases, while amplitude is unrelated to this motion.

Answer:

D. Frequency increases