“volume expander”的概念、定义、翻译、参考文献-科学参考

单词	volume expander
释义	volume expander [`väl·yǝm ik´span·dǝr] ^{ENGINEERING ACOUSTICS} An audio-frequency control circuit sometimes used to increase the volume range of a radio program or recording by making weak sounds weaker and loud sounds louder; the expander counteracts volume compression at the transmitter or recording studio. Also known as automatic volume expander.
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