“acoustic shadow”的概念、定义、翻译、参考文献-科学参考

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单词	acoustic shadow
释义	acoustic shadow 声影区
随便看	pulse -amplitude discriminator pulse amplitude discriminator unit pulse amplitude distribution pulse amplitude-modulated altimeter pulse-amplitude-modulated carrier pulse amplitude modulated sample pulse amplitude modulation pulse-amplitude modulation pulse amplitude modulation-frequency modulation pulse amplitude modulation (PAM) pulse-amplitude modulation switching system pulse amplitude modulator pulse amplitude spectrum pulse-amplitude spectrum pulse amplutude-to-time converter pulse analysis pulse analytical computer pulse analyzer pulse annealing pulse antenna pulse apex pulse arc starter pulse arc welding pulse arrival pulse as an indicator of disease