Because normally the electro-acoustic equipment, technical specifications are given quasi-average noise level, rather than quasi-peak noise level, this should be noted.
因为通常电声设备技术指标给出的是噪声准平均值电平，而不是噪声准峰值电平，这一点应加以注意。
Results showed that the research under the concept of the acoustic mode is significant in the efforts of reducing the noise level of ships.
结果表明，研究结构在声辐射模态概念下的噪声特性是船舶降噪研究中的一条新途径。
The key to reduce the internal noise level is that we should estimate the acoustic field accurately and then go on low noise optimization design to body structure during the course of designing.
降低车辆内部的噪声的关键是在设计阶段要准确预估车内声场特性进而对车身结构进行低噪声优化设计。
Then use this model to predict equivalent continual sound level of road traffic noise, the fluence factors as the traffic flowing and the equivalent acoustic levels were output.
并运用该模型预测道路交通噪声的等效声级，把预测因子作为样本输入到网络模型，噪声等效声级作为样本输出。
The distance between the acoustic-emission source and the receiving transducer, and the background noise level are primary factors in selecting a particular frequency band.
声发射源与接收讯号传感器间的距离以及环境噪声的电平是选择频带的主要依据。
We get and analysis the data of the reverberation, noise and acoustic pressure level of the Conference Hall and Lecture Hall in some northern university in measurement.
实测和分析了北方某大学的甲报告厅和乙会议厅的混响时间、景噪声、场级等数据。
Underwater acoustic channel is a time-space-frequency variant channel, having a character for narrow bandwidth, high ambient noise level and strong interference of multipath.
而由此构成的水声信道是一个空间与频率响应随机快速变化的传输信道，存在窄带、高噪及强多途干扰。
Underwater acoustic channel is a time-space-frequency variant channel, having a character for narrow bandwidth, high ambient noise level and strong interference of multipath.
而由此构成的水声信道是一个空间与频率响应随机快速变化的传输信道，存在窄带、高噪及强多途干扰。
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