When a 557 hz tone is sounded at the same time as a 517 hz tone, the beat frequency would be 40hz.
The difference in frequency between two waves is known as the beat frequency. It is as a result of both positive and negative interference. While we perceive the regular frequency of the waves as the pitch of the sound, we perceive the beat frequency as the rate at which the loudness of the sound varies.
The difference in frequency between the two superimposed waves is the formula for beat frequency.
Beat is the pulsing that two waves with slightly differing frequencies combine to create in physics.
Beat frequency = | f1 - f2 | or no. of cycles/time
= |557-517|
= 40Hz
Thus, the beat frequency is 40Hz
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