Question

an object is approaching you while making a sound.
what is perceived about the pitch of the sound?

○ it is perceived to be fluctuating.

○ it is perceived to be unchanged.

○ it is perceived to be lower.

○ it is perceived to be higher.

Explanation:

This is based on the Doppler Effect, which states that when a sound-emitting source moves toward an observer, the sound waves are compressed, increasing the perceived frequency. Since pitch is related to frequency, a higher frequency means a higher perceived pitch.

Answer:

It is perceived to be higher.