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

NNI n. = noise and number index n. at noise n. Compounds 2.

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).

1970 R. D. Ford Introd. Acoustics vii. 144 An external NNI of 55 has been taken as the recommended limit in the vicinity of London Airport and householders exposed to more noise have been offered a special grant for soundproofing their homes.

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.

单词	nni
释义	> as lemmas NNI NNI n. = noise and number index n. at noise n. Compounds 2. Π 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). 1970 R. D. Ford Introd. Acoustics vii. 144 An external NNI of 55 has been taken as the recommended limit in the vicinity of London Airport and householders exposed to more noise have been offered a special grant for soundproofing their homes. 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 Nn. < as lemmas
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