Correct option is C
The perception of sound is based on two major physical characteristics of sound waves:
- Amplitude (height of wave) → perceived as Loudness
- Frequency (cycles per second or Hz) → perceived as Pitch
Let's analyze each statement thoroughly:
Statement A: The loudness of a sound is inversely correlated with the amplitude of a sound wave. Incorrect
- Loudness is directly, not inversely, related to amplitude.
- Higher amplitude → louder sound, lower amplitude → softer sound.
- This statement is incorrect.
Statement B: The loudness of a sound is directly correlated with the amplitude of a sound wave. Correct
- This is the correct explanation of how loudness is perceived.
- As amplitude increases, sound appears louder to the human ear.
- Hence, correct statement.
Statement C: The pitch of a sound is directly correlated with the frequency of the sound wave. Correct
- Pitch is the perceptual quality that corresponds to frequency.
- Higher frequency → higher pitch, lower frequency → lower pitch.
- This is scientifically accurate.
Statement D: The pitch of a sound is inversely correlated with the frequency of the sound wave. Incorrect
- This is the opposite of the correct relationship.
- Pitch increases with frequency, not decreases.
- Therefore, incorrect statement.
Statement E: The pitch of the average male voice in conversation is lower than that of the average female voice. Correct
- Male voices typically range from ~85–180 Hz, while female voices range from ~165–255 Hz.
- So, female voices have higher pitch due to higher frequency, making this statement correct.
Statement F: The pitch of the average male voice in conversation is higher than that of the average female voice. Incorrect
- This is factually opposite to the actual data.
- Female voice pitch > Male voice pitch, hence this is incorrect.
