Noise wave investigation in the field is an important means for determining optimum field parameters, and it causes direct influence on the quality of data acquisition.
野外干扰波调查是指导正确选择野外采集参数的重要手段，直接影响采集数据的质量。
Methods a hygienic investigation of workplaces was carried out in oceangoing vessel, and the results of hearing examination in 1 663 noise exposed mariners were compared with controls.
方法对远洋测量船作业环境进行卫生学调查，对1 663名接触噪声人员的听力进行分析，并设对照组进行比较。
RESULTS In this investigation the items of some priority department can′t catch the standard level such as total bacteria number, relative humidity and noise.
结果在本次调查各重点科室室内空气的细菌总数、相对湿度和噪声合格率偏低。
Methods A hygienic investigation was carried out in a certain artificial gem plant, and dust concentrations and noise level of the workshops were measured.
方法对某宝石厂车间作业环境进行卫生学调查，测量车间环境粉尘和噪声水平。
An investigation was made on the main noise source-the gearbox of the underwater vehicle to reduce the noise and improve its capability of goal-detecting under the water.
为了降低某水下航行装置的辐射噪声，增强其探测目标的能力，对该装置的重要噪声源——传动齿轮箱进行了减振降噪的试验研究。
The paper monitored function noise, regional noise and traffic noise in Fushun city by investigation on the spot and combination data of authoritative department.
该论文采用实地调查手段，并与权威部门统计资料相结合，对抚顺市功能区噪声、区域环境噪声和道路交通噪声进行了监测。
Based on investigation and test of the noise of the spinning workshop and the weaving workshop in textile mills, the noise condition in textile mills is analysed.
对纺织厂织布车间，细纱车间的噪声情况做了调研与测试。
The paper reports the results of an investigation of the characteristic of combustion pressure oscillation in a D. I. diesel engine and their effect on engine noise.
本文报告了对直喷式柴油机燃烧压力振荡特性及压力振荡对燃烧噪声影响规律的研究。
In this paper, the experimental investigation and theoretical study on reduction of the ducted propeller cavitation noise by air injection are presented.
本文介绍用人工喷入空气的方法降低导管螺旋浆空泡噪声的试验和理论研究。
Noise pollution of draught fan and cooling tower is very serious through the investigation and analysis.
本文从对噪声扰民案件入手、分析，发现风机和冷却塔噪声污染最为严重。
Noise pollution of draught fan and cooling tower is very serious through the investigation and analysis.
本文从对噪声扰民案件入手、分析，发现风机和冷却塔噪声污染最为严重。
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