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Question
Two sound waves of frequencies 256 and 286 superimpose to produce beats in air. Then, the number of beats heard by a person will be :
Two sound waves of frequencies 256 and 286 superimpose to produce beats in air. Then, the number of beats heard by a person will be :
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Solution
The correct option is C zero
Though the difference in the two frequencies is 30 Hz, human ear is capable of detecting beats with frequencies of 7 Hz and below. Therefore human will not listen this beat frequency. Option 'D' is correct.
Though the difference in the two frequencies is 30 Hz, human ear is capable of detecting beats with frequencies of 7 Hz and below. Therefore human will not listen this beat frequency. Option 'D' is correct.
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