Two guitar players are simultaneously playing a note. One note is played at 420 Hz; the other is played at 424 Hz. The resulting tone will be at
A) 844 Hz with a beat frequency at 4 Hz.
B) 422 Hz with a beat frequency at 2 Hz.
C) 422 Hz with a beat frequency at 4 Hz.
D) 2 Hz with a beat frequency at 422 Hz.
E) 4 Hz with a beat frequency at 422 Hz.

Question

Quizplus · Accepted Answer

The resulting tone will be at the average frequency of the two played notes, which is (420 Hz + 424 Hz) / 2 = 422 Hz. The beat frequency is the difference between the two frequencies, which is 424 Hz - 420 Hz = 4 Hz.

Two Guitar Players Are Simultaneously Playing a Note