Question

Using an oscilloscope, it can be observed that the pitch of a sound is directly related to a sound wave’s frequency while the volume is directly related to a sound wave’s amplitude. The change shown in the illustration suggests that the A) pitch is increasing. B) pitch is decreasing. C) volume is increasing. D) volume is decreasing.

Answer 1

Answer:     D

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Answer 2

Your answer is D.

The change in the illustration shows a decrease in amplitude. Because a sound wave’s amplitude is directly related to a sound’s volume, the change in the wave tells us that the volume is decreasing.