英语词汇“PNdB”的读音、翻译、释义、用法及例句-青年旅行网

词汇	PNdB
释义	PNdB PNdB, PNdb n. Abbreviation of perceived noise decibel (a standard unit for measuring noise, based on the type of sound and its intensity). 噪音分贝(按声音的类型和强度计量噪音的标准单位)。
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