問題詳情
3.Two pure tones are sounded together and a particular beat frequency is heard. What happens to thebeat 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) We cannot tell from the information given.
參考答案
答案：E
難度：計算中-1
書單：沒有書單，新增