Question

Science 5Sound AssignmentExamine cach of the sound wave changes below. Identify eachas a change in pitch or a change in loudness. Then, write anexplanation for your answer in the space providedNote: Sound waves are not shaped quite like the waves below, but we will use this shape because it easy to see their characteristics on paper. Sound Wave BeforeAmplitudeSound Wave AfterAmplitudea. Does the sound wave above experience a change in pitch orLoudness? Why?Sound Wave Before1 SecondSound Wave After1 secondb. Does the sound wave above experience a change in pitch orloudness? Why?

Answer 1

Given the diagrams of the change in the sound waves.

a)

In the given diagram, we can see the change in the amplitude of the sound wave but the frequency of the wave remains the same. The loudness of sound depends on its amplitude. The loudness of sound is directly proportional to the square of the amplitude.

Thus, as the amplitude of the wave changes, its loudness changes.

b)

In the given diagram, we can see a change in the frequency of the sound wave but its amplitude remains the same. The pitch of a sound depends on its frequency. As the frequency of a sound increases the pitch of the sound increases.

Thus, as the frequency of the given wave changes, its pitch changes.