Sometimes we need to monitor noise levels on an ongoing level and make longer measurements sub-divided by shorter measurement durations such as 5 minutes, 15 minutes or 1 hour.
有时候，我们需要不断监测水平的噪音水平，使子长测量由测量持续时间较短的划分，如5分钟，15分钟或1小时。
According to error analysis of sound level measurement and practical case some objection was raised to levy standard on Noise Exceeding Environment standard.
依据声级测量的误差分析，结合实例，对国家现行《超标环境噪声排污费征收标准》提出异议。
At last, correction method of low level signal measurement is discussed duo to effect of spectrum analyzer floor noise.
最后，讨论了频谱仪本地噪声对低电平信号测量影响的修正方法。
The source level of the ship-radiated noise is estimated by analyzing the measurement records from passage ship noise.
通过对实测舰船数据分析估计舰船辐射噪声的总声源级。
Range Vernier technique is a novel phase ranging technique, which can provide radial measurement with noise values at sub-qtr-wavelength level.
游标测距技术是一种新颖的相位测距方法，该技术可以提供精密的径向距离测量值，其随机误差小于四分之一波长。
The influence of wind velocity on noise measurement of sound level has been introduced and the permitted wind velocity has been determined.
介绍了风速对噪声声级测量的影响，确定了噪声测量的风速允许值。
With the measurement of average sound pressure level and sound power level, the noise reduction result of the oil pan made by sandwich steel plate was proved.
通过平均声压级和声功率级的测试验证了复合钢板试制的油底壳的降噪效果。
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。
Sound-level meter by its simple, convenient, the cost is low, the precision higher a series of merits, become one of aircraft noise measurement aspect main metering equipment.
声级计以其简单，方便，成本低，精度高等一系列优点，成为航空器噪音测量方面主要的测量仪器之一。
A new method was advanced for calculating 3-d noise expediently. The method has the practical merit for 3-d noise measurement and quality evaluation of discrete low-light-level imaging system.
为了方便地计算三维噪声，提出了一种新的三维噪声计算方法，该方法对离散型微光成像系统三维噪声测量和质量评价具有十分重要的实用价值。
A new method was advanced for calculating 3-d noise expediently. The method has the practical merit for 3-d noise measurement and quality evaluation of discrete low-light-level imaging system.
为了方便地计算三维噪声，提出了一种新的三维噪声计算方法，该方法对离散型微光成像系统三维噪声测量和质量评价具有十分重要的实用价值。
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