These levels come from outside activities that penetrate the classroom structure, from teaching activities, and other noise generated inside, which can be exacerbated by room reverberation.
这些（噪音）可以是穿透教室建筑结构的室外活动声、教学活动的声音以及室内产生的其它各种声响，这些声音都会因为房间的回声效果而被放大。
Those experiencing these disorders often find sounds such as crowd noise and the noise generated by machinery painful and distressing.
那些经历这些障碍的人常常觉得噪音——如人群的噪音和机器产生的噪音——令人痛苦和苦恼。
The theoretical limit of sensitivity in any measurement is determined by the noise generated by the resistances present in the circuit.
测量灵敏度的理论极限取决于在电路中的电阻所产生的噪声。
The Edge Baffle Rig reduces the noise generated by jet interference and minimizes edge over-coating, particularly for low speed, heavy coatings.
边缘挡板用于降低喷流产生的噪音，并减少边缘镀层增厚，特别用于低速及厚镀层情况。
The noise generated by wheels and rails was decreased by 9 decibels, which is more favorable for night driving.
轮轨噪声同比下降超过9分贝，夜间行驶更安静。
The results of computation and experiment show that an optimal width of the deflecting ring exists to make the noise generated by the outdoor set minimum.
通过计算分析和试验验证，表明空调器室外机导流罩的宽度存在一个最佳值使室外机的噪声最小。
So, researches of diagnosis technology of conducted EMI noise generated by power electronic equipments and mechanism of conducted EMI become more significant.
因此对电力电子装置的传导性电磁干扰诊断技术以及其传导性干扰的产生机理研究具有十分重要的意义。
On the basis of analysing composition and testing results of noise generated by high speed punch press the major noise sourse and the noise characteristics are pointed out.
在对高速冲床的噪声组成及其测试结果分析的基础上，指出了主要噪声源及噪声特性。
The results of simulation show that adaptive noise cancelling techniques could cancel the strong noise generated by the ship to restrain the noise from disturbing the sonar.
仿真结果表明自适应噪声抵消技术可以有效抵消本舰发出的强噪声，从而抑制本舰噪声对舰载声呐的干扰。
On the basis of analysing composition and testing results of noise generated by high speed punch press, the major noise sourse and the noise characteristics are pointed out.
在对高速冲床的噪声组成及其测试结果分析的基础上，指出了主要噪声源及噪声特性。
Make use of the laser-generated cavitation noise to generate false target based on this property, which is simulation of the cavitation noise generated by submarine propeller.
针对这一特征，考虑利用激光光源在远处水下产生空化噪声作为假目标，用来模拟潜艇螺旋桨产生的空化噪声。
This paper analyzes the mechanism of noise generation, and indicates that the source of noise generated from a resonating saw blade is the key source for the noise generation.
分析了圆锯片噪声产生的机理，同时指出共振噪声是圆锯片噪声的重要组成部分。
And a numerical simulation is performed on interior noise generated by the excitation of engine using the model. The simulation results are verified by test under same conditions.
用该模型对发动机激励产生的车内噪声进行数值仿真，并通过试验对仿真结果进行验证。
The exhaust noise generated by a pressure switch is silenced by the exhaust silencer through the pipeline and then diffused in the big cavity, and the noise is significantly reduced.
压力开关产生的排气噪音通过管路到排气消声器消音再到一个大腔体中扩散，使噪音明显降低。
The mechanisms of the noise generated in mine ventilation system, mainly in ventilators and electric motors, are analyzed in detail main measures and ways of noise controlling are put forward.
就矿井通风系统(主要针对通风机、电动机)噪声产生的机理进行了较深入的研究分析，并提出其噪声控制的主要措施与途径。
The mechanisms of the noise generated in mine ventilation system, mainly in ventilators and electric motors, are analyzed in detail main measures and ways of noise controlling are put forward.
就矿井通风系统(主要针对通风机、电动机)噪声产生的机理进行了较深入的研究分析，并提出其噪声控制的主要措施与途径。
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