median of sounds level
基本释义:
噪声声级的中间值
网络释义
1)median of sounds level,噪声声级的中间值
2)noiseratingnumbers , NRN,噪声级数,噪声分级值,NRN
3)medium of sound level,声级中值
4)noise rating number,噪声分级值(NR值)
5)noise grade A,噪声A声级
6)equivalent sound level,等值噪声等级
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