噪声电平（Noise Level） 这项测试是检测声卡的本底噪音，由于声卡在工作过程中会产生噪声信号，本项测试就是检测声卡的噪音值，当然测试的数值越小越好。
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... severe acoustic noise environment 严重噪声环境 acoustic noise level 噪声电平 acoustic noise specification 声音噪声要求 ...
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... snow leopard(Panthera uncia) ==> 雪豹 snow level ==> 噪声电平 snow limit ==> 雪线 ...
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归一的作用是在各种不同合成情况下使输出噪声电平基本保持不变。
The function of normalization is to remain the output noise level unchanged in various cases of different synthesis.
环境噪声电平是评价频率通道能否可用的关键指标，因而正确测量环境噪声具有十分重要的意义。
Since the environmental noise level is the key index for evaluating the availability of frequency channels, it is very important to accurately measure the environmental noise.
本文就高压架空送电线路设计中，按实际工程情况计算短波无线电收信台所需防护间距时，环境噪声电平取值问题进行了初步探讨。
The level value for environmental noise when calculating the necessary protective space of shortwave wireless receiver in the design of high voltage trolly wire was discussed.
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