Because normally the electro-acoustic equipment, technical specifications are given quasi-average noiselevel, 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。
2
Results showed that the research under the concept of the acoustic mode is significant in the efforts of reducing the noiselevel 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。
3
The key to reduce the internal noiselevel 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.