“perceived noise level”的概念、定义、翻译、参考文献-科学参考

单词	perceived noise level
释义	perceived noise level [pǝr`sēvd ¦nȯiz ´lev·ǝl] ^ACOUSTICS In perceived noise decibels, the noise level numerically equal to the sound pressure level, in decibels, of a band of random noise of width one-third to one octave centered on a frequency of 1000 hertz which is judged by listeners to be equally noisy.
随便看	degeneracy degeneracy pressure degenerate amplifier degenerate code degenerate conduction band degenerate conic degenerate electron gas degenerate four-wave mixing degenerate matter degenerate semiconductor degenerate simplex degeneration degenerative arthritis degenerative disease degenerative joint disease degenerative recrystallization Degeneriaceae deglaciation deglitcher deglutition degradation degradation failure degradation product degradation recrystallization degradative plasmid

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