“active sound cancellation”的概念、定义、翻译、参考文献-科学参考

单词	active sound cancellation
释义	active sound cancellation [¦ak·tiv `saund ´kan·sǝ´lā·shǝn] ^ACOUSTICS Any technique in which a control sound source creates sound in a selected region equal in amplitude and opposite in phase to sound that would otherwise exist, but this sound cancellation cannot be maintained in the presence of system changes unless there is also a feedback mechanism.
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