Two pure tones are sounded together and a particular beat frequency is heard. What happens to the beat frequency if the frequency of one of the tones is increased?
A) It increases.
B) It decreases.
C) It does not change.
D) It becomes zero.
E) It could either increase or decrease.

Question

Quizplus · Accepted Answer

The beat frequency is the absolute difference between the frequencies of the two tones. If one frequency is increased, the beat frequency could either increase or decrease depending on whether the frequency being increased was initially higher or lower than the other frequency.

Two Pure Tones Are Sounded Together and a Particular Beat