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If the frequencies of two component waves are 24 Hz and 20 Hz, they should produce _______ beats per second.

A. 2
B. 4
C. 8
D. 12

Respuesta :

AL2006
They produce two "beat" waves.
One beat is at 44 Hz.
The other one is at 4 Hz.

Answer:

B. 4

Explanation:

Beat frequency (fb) is calculated as follows:

fb = |f1 - f2|

where f1 and f2 are two sounds frequencies, in this case, 24 Hz and 20 Hz. Replacing in the equation:

fb = |24 - 20| = 4 Hz

Then, they should produce they 4 beats per second