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echo
- 声音回音功能, 一. 原理:设原语音信号为x(n),d为从声源到反射面间的往返时延,a为衰减系数(a<1)。(Sound echo function, 1. Principle: set the original speech signal as X (n), D is the round-trip delay from the sound source to the reflecting surface, and a is the attenuation coefficient (a&l