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

> as lemmas

noise and number index

noise and number index n. a quantity used in evaluating aircraft noise in terms of its intensity and frequency of occurrence; abbreviated NNI.

ΚΠ

1963 Final Rep. Comm. Probl. Noise 218 in Parl. Papers 1962–3 (Cmnd. 2056) XXII. 657 Measurement of noise levels and studies of the numbers of aircraft likely to be heard were made... The results have been combined..to form a Noise and Number Index (NNI).

1971 Physics Bull. Nov. 660/3 An exposure index for aircraft noise has been developed from this survey, called the noise and number index.

1988 Daily Tel. 31 Aug. 29/3 The term NNI is Noise and Number Index; 45 NNIs would interrupt a conversation, and 60 NNIs would wake the sleeping, but not the dead.

extracted from noisen.

as lemmas

单词	noise and number index
释义	> as lemmas noise and number index noise and number index n. a quantity used in evaluating aircraft noise in terms of its intensity and frequency of occurrence; abbreviated NNI. ΚΠ 1963 Final Rep. Comm. Probl. Noise 218 in Parl. Papers 1962–3 (Cmnd. 2056) XXII. 657 Measurement of noise levels and studies of the numbers of aircraft likely to be heard were made... The results have been combined..to form a Noise and Number Index (NNI). 1971 Physics Bull. Nov. 660/3 An exposure index for aircraft noise has been developed from this survey, called the noise and number index. 1988 Daily Tel. 31 Aug. 29/3 The term NNI is Noise and Number Index; 45 NNIs would interrupt a conversation, and 60 NNIs would wake the sleeping, but not the dead. extracted from noisen. < as lemmas
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