Question 29

The pitch of a sound is related to frequency.

Pitch is directly related to the frequency of a sound wave, with higher frequencies producing higher pitches and lower frequencies resulting in lower pitches.

A) Speed

Speed refers to how fast the sound wave travels through a medium, but it does not affect the pitch. While the speed of sound can vary depending on the medium and temperature, it does not determine how high or low a sound is perceived.

B) Frequency

Frequency is the number of cycles of a sound wave that occur in one second, measured in Hertz (Hz). It is the primary determinant of pitch; higher frequencies correspond to higher pitches, making this option correct.

C) Amplitude

Amplitude relates to the loudness or intensity of a sound wave, not its pitch. While a sound with a greater amplitude will be perceived as louder, it does not influence the frequency or pitch of the sound.

D) Energy

Energy in the context of sound waves refers to the intensity and loudness of the sound, but it does not correlate with pitch. Higher energy levels can create louder sounds, but the pitch is solely dependent on the frequency of the wave.

Conclusion

Frequency is the only option that directly relates to the perception of pitch in sound waves, making it the definitive correct answer. All other options, while related to sound in different ways, do not influence the pitch and therefore are incorrect in this context.