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3-5: 1 SEE ANSWER

From KNILT

Answer: 80 Hz


The beat frequency is found with the formula f2-f1. We know the component waves have frequencies 400 Hz and 320 Hz. Thus the beat frequency is found with the formula 400 Hz - 320 Hz = 80 Hz.


  1. REDIRECT 3-5 Perception of Two Pure Tones