noise reduction 降噪 ; 视频降噪 ; 降噪技术 ; [环境] [电子] 噪声降低
noise reduction coefficient 噪声降低系数 ; 降噪系数 ; [声] 减噪系数
dynamic noise reduction 动态降噪电路 ; 动态降噪
Dolby noise reduction 杜比降噪 ; 杜比降噪系统
noise reduction friction course 吸音道路面层
Noise Reduction Barrier 隔声屏障 ; 隔声屏
Noise Reduction System 降噪系统 ; 降低噪声系统 ; [电子] 噪声降低系统
Dual mic for noise reduction 双麦克风降噪
Digital noise reduction 数字降噪 ; 数码降噪 ; 数字降噪功能
This paper introduces the features of air shaft noise, the condition of air shaft noise before reduction noise, the goal and requirement of reduction noise and main noise sources control.
介绍了风井噪声的特点、降噪前风井的噪声状况、降噪的目标和要求以及主要噪声源噪声控制。
A number of countries are already in the process of formulating their own standards for the control and reduction of classroom noise.
一些国家已经在着手制定本国关于控制和减少教室噪音的标准。
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