Question

The frequency of a sound wave increases. what happens to the sound

A. The volume decrease
B. The volume increase
C. The Pitch decrease
D. The Pitch increase

Answer 1

The increase in frequency of a sound wave results in the increase of its pitch, not volume. The pitch increases because pitch is directly related to the frequency of sound waves, while volume is related to the amplitude.

Step-by-step explanation:

When the frequency of a sound wave increases, the pitch of the sound increases. This is because the pitch of a sound is directly related to the frequency of the sound waves. Here, the volume, which is related to the amplitude of the wave, is not affected by changes in frequency. Therefore, the correct answer to the question is D. The Pitch increase.

If the period of a wave increases, it means the wave takes longer to repeat itself. Since frequency is the number of cycles per second, if the period increases (meaning fewer cycles per second), then the frequency decreases (Option a). This is an inverse relationship.

Furthermore, if the amplitude and frequency of a sound wave are both increased, the loudness (related to amplitude) and pitch (related to frequency) of the sound both increase. When a source of sound moves towards you, the frequency you perceive increases due to the Doppler Effect, making the sound higher-pitched (Option a).

Answer 2

If the frequency of a sound wave increases, the pitch of the sound will increase. This means that the sound will become higher in pitch, or higher in frequency.

The volume of the sound, or the loudness of the sound, is not directly related to the frequency of the sound wave. Instead, the volume of a sound is determined by the amplitude of the sound wave, which is a measure of the wave's height.

Therefore, the correct answer is "D. The Pitch increase."