英语词汇“perceived noise decibel”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	perceived noise decibel
释义	perceived noise decibel perceived noise decibel n (Units) a unit for measuring perceived levels of noise by comparison with the sound pressure level of a reference sound judged equally noisy by a normal listener. Abbreviation: PNdB perceived noise decibel perceived noise decibel [pər′sēvd ¦nȯiz ′des·ə‚bel] (acoustics) A unit of perceived noise level. Abbreviated PNdB.
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