Question

Could you please help?

The Doppler shift involves a shift in the _____. List all that apply

A) the loudness of a sound observed by a listener
B) the percieved pitch of a sound observed by a listener
C) actual frequency produced by the source of sound
D) actual intensity produced by the source of sound
E) None of these

Answer 1

A moving source of sound changes the waves students hear in a manner known as the Doppler Effect. "Beats" of sound are heard when two vibrations of similar frequency are produced at the same time and are heard together.

Sound waves traveling through solids and air are observed, showing that sounds generally travel faster through more dense objects. Rough attempts are made at measuring how fast sound travels in air.

Answer 2

The answer is B.

The Doppler shift involves a shift in the perceived pitch of a sound observed by a listener.