更新1:
我得十歲咋，唔係好明你啲英文.......好複雜.......
點解回聲嘅內容會同我發出的聲音一樣？急！
回答 (1)
2011-04-18 6:12 am
✔ 最佳答案
Why not...!There is no change of sound frequency on reflection. The echo is thus of the same frequency as the original sound, but with the sound quality and intensity somewhat lowered.
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110416000051KK00836