The loudness of sound depends upon the
- (a)velocity of sound waves in the medium.
- (b)amplitude of the sound waves.
- (c)frequency of the sound waves.
- (d)frequency and velocity of the sound waves.
Correct — B, the amplitude of the sound waves. Loudness is how strong a sound seems, and it is set by the amplitude of the wave — a larger amplitude carries more energy per unit area (greater intensity) and is heard as a louder sound. Frequency fixes the pitch, not the loudness, and the speed of sound is decided mainly by the medium.
- (a)velocity of sound waves in the medium. — The speed of sound depends chiefly on the medium and its temperature; it does not decide how loud a sound seems.
- (c)frequency of the sound waves. — Frequency determines the pitch of a sound (high or low), not its loudness.
- (d)frequency and velocity of the sound waves. — Both frequency (which sets pitch) and velocity (a property of the medium) are unrelated to loudness, which is fixed by amplitude.
A sound wave has three chief measurable properties — amplitude, frequency and speed — each linked to a different heard quality. Amplitude sets the loudness (larger amplitude means a louder, more intense sound), frequency sets the pitch, and speed is a property of the medium the sound travels through.
The options deliberately mix loudness with pitch and speed. Keeping the amplitude-to-loudness and frequency-to-pitch pairings straight lets you pick amplitude for loudness.
- Loudness increases with the amplitude of the sound wave (greater intensity).
- Pitch is determined by frequency; a higher frequency gives a higher pitch.
- The speed of sound depends mainly on the medium and its temperature, not on loudness or pitch.
- Loudness is commonly measured in decibels (dB).
Loudness tracks amplitude while frequency sets pitch — the answer is (b).
- Confusing loudness with pitch — pitch is the frequency effect, loudness is the amplitude effect.
- Thinking a faster sound is a louder sound; speed is a property of the medium.
Asked by matching a heard quality (loudness or pitch) to the wave property that controls it.
No directly related past PYQ was found.
- practice — not a real PYQ
The pitch of a sound is determined by its
- (a)amplitude
- (b)frequency
- (c)speed
- (d)intensity
Answer(b) frequency — a higher frequency gives a higher pitch.
- practice — not a real PYQ
The loudness of a sound is commonly measured in
- (a)hertz
- (b)decibel
- (c)newton
- (d)metre per second
Answer(b) decibel — the usual unit for loudness/intensity level.