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Beat Frequency

There are two...

Question

There are two tuning forks 'A' and 'B', each of frequency $512$ $H z$ . Thread is wound over one of the prongs of 'A'. Both the tuning forks are excited simultaneously. A peculiarity in the sound is observed. What do you call this phenomenon?

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Solution

When two sound waves of different frequency approach our ear, the alternating constructive and destructive interference causes the sound to be alternatively soft and loud. This phenomenon which is called is called as beat formation.

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