Physics
Instruments A and B are producing sounds of the same amplitude, same waveform but frequencies F and 2F respectively. Which of the following statements is correct ?
- both A and B differ in quality
- B is grave but A is shrill
- A is grave but B is shrill
- B is louder than A
Sound
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Answer
A is grave but B is shrill
Reason — Pitch (shrill or grave) of a note depends on it's frequency.
Therefore, more the frequency of wave, higher (shriller) is it's pitch and less the frequency of wave, lower (grave) is it's pitch.
Hence, sound of B is shriller as it's frequency is high and that of A is grave as it's frequency is low.
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