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.
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.
