“ineffectiveness of high frequency”的概念、定义、翻译、参考文献-科学参考

单词	ineffectiveness of high frequency
释义	ineffectiveness of high frequency Encyclopedia 工学高频失效释 ineffectiveness of high frequency高频失效当噪声以平面波进入消声器的平直的介质流通通道，通道横截面尺寸一定时，频率越高（波长越短）的噪声就有越大的比例接触不到消声构件的壁面，消声构件对这些高频噪声的衰减作用逐渐减弱直至消声效果可以忽略的现象。
随便看	public key certification public key cryptographic based on elliptic curves for China commercial cryptography public key cryptography public-key cryptography Public key Cryptography Analysis public key cryptography key management public-key cryptosystem public-key distribution public key encryption public-key encrytption public key infrastructure public key infrastructure/certificate authority（PKI/CA） public key infrastructure (PKI) public key infrastructure, PKI public-key system Public knowledge Management Publick Occurrences, Both Foreign and Domestick Public Land Public Land in Palau public law Public Law 480 Program public lending right Public Lending Right Act 1979 public liability insurance Public Libraries and Museums Act

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