Single Choice

The sketches I to IV in Fig. show sound waves, all formed in the same time interval. Which diagram shows a bass (low frequency) note?

AI
BII
Correct Answer
CIII
DIV

Solution

Frequency is the speed of the vibration, and this determines the pitch of the sound. It is only useful or meaningful for musical sounds, where there is a strongly regular waveform. In other words, frequency is the number of cycles per second in a particular wave pattern.
In the question, figure II has the least number of cycles, and hence, it has a low frequency or a base note.

SIMILAR QUESTIONS

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What determines the pitch of a sound?

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Describe an experiment to show the production of sound having low and high pitch.

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Complete the following sentences: (a) The pitch of sound increases if its frequency ………….. (b) If the amplitude of a sound is halved, its loudness becomes ..............

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