gc textbook chapter 12 Sound (id: 83082e4aa)

本题目来源于试卷: gc textbook chapter 12 Sound，类别为 通用国际物理

[填空题]
A certain dog whistle operates at 23.5 kHz, while anoh3.,,inu zuggther (brand X) operatpnkzyf, rwpm15: 5q 5ses at an unknown frequency. If neither whiss,1p5ynqfm zpk:r5 5wtle can be heard by humans when played separately, but a shrill whine of frequency 5000 Hz occurs when they are played simultaneously, estimate the operating frequency of brand X.    kHz

参考答案: 28.5±2%


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