As you are moving very quickly toward a speaker emitting a pure tone,which characteristics of the sound get larger? (There may be more than one correct choice. )
A)frequency
B)amplitude
C)wavelength
D)period
E)loudness

Question

Quizplus · Accepted Answer

When moving quickly toward a speaker, the frequency of the sound increases due to the Doppler effect, making the pitch higher. This perceived increase in frequency can also make the sound seem louder, hence affecting the loudness. The amplitude, wavelength, and period of the sound wave itself do not inherently change just by the listener moving towards the source; these changes are related to the source's output and the medium through which the sound travels.

As You Are Moving Very Quickly Toward a Speaker Emitting