EPA also enforces noise standards for trucks and airplanes.

环保局对卡车和飞机也规定了噪音标准。

A number of countries are already in the process of formulating their own standards for the control and reduction of classroom noise.

一些国家已经在着手制定本国关于控制和减少教室噪音的标准。

Ultra low noise operation, the operation of the process is almost no sound, fully in line with national environmental standards, can be placed indoors.

超低静音工作，机芯运作过程几乎不发生任何声响，完全符合国家环保标准，可以放在室内。

With noise level held to meet national standards, the noise 1m away from fan cover should be confined below 85 dB.

风机噪声达到国家标准，且距风机机壳外1米处的噪声不得大于85分贝。

Built to the strict criteria of Defence Standards, ruggedly engineered for shock, and with low noise, vibration and magnetic field emission.

建立了防御标准的严格标准，坚固的设计和冲击，具有噪音低，振动和磁场发射。

In 1972, Paris International Noise Professional Meeting gave a formal definition of infrasound, and discussed its exposure standards.

1972年，巴黎国际噪声专业会议正式确定了次声的定义，并对次声的暴露标准展开讨论。

The construction Principle and the main specifications of the low noise fluid Power transmision and conrtol systems and components with the existing standards in the world are gave.

论述了理论分析，给出了具有目前国际同类产品先进水平的低噪声液压元件和系统的结构原理与主要的技术指标。

The a sound level on influencing humans' hearing sense normally adopt as an index in current noise assessment standards, though psychological and mental influence is neglected.

现有噪声标准一般采用基于对人听觉影响的A声级作为评价量指标，而忽视了噪声对人的心理和精神方面的影响。

This paper introduces the requirements for sound testing environment by the national standards for engine noise testing and proposes the targets for the construction of engine noise laboratories.

本文介绍了国家标准中内燃机噪声测试对声学测试环境的要求，提出了内燃机噪声实验室建设的指标。

These noise and the strict implementation of production standards, and used the regular operation of the machine manufacturers produced the biggest difference between the brand-name products.

而这些杂音，和严格执行生产标准、并且用机器操作的正规厂家所生产的品牌产品之间最大的区别。

Secondly, some amount of noise assessment, noise limits and standards were particularized in some countries.

其次，列举一部分国家的城市噪声评价量、噪声限值和标准。

Reduce noise through a variety of methods, to achieve real standardization compressor, in line with the state standards.

通过种种减小噪音的方法，使压缩机真正的实现规范化，符合国家规定的标准。

The noise could reach the relevant standards and achieve better environmental and social benefits through setting the arc fish scale sound barrier by simulation and plan evaluation.

经方案论证，设置弧形鱼鳞状吸声型声屏障，噪声均达到相关标准规定，取得较好的环境与社会效益。

When the environmental standards in urban scenic parks have not been put forward at present, this method is important for correct assessment of the environmental noise quality of scenic parks in city.

在目前尚未对城市风景旅游公园建立专门的噪声标准的情况下，这一评价方法对正确评估城市风景旅游公园的声环境质量有积极的实用意义。

The prototype has a countdown, and power failure alarm function. It produces oxygen stable with low noise, consistents with relevant national product standards.

该样机具有倒计时，断电报警等人性化功能，产氧稳定，噪音低，符合国家相关产品标准。

The motors are installed inside a sturdy plastic case; special noise buffers reduce the noise within the safety standards of work.

马达被安装在一个牢固的塑料盒里，噪声缓冲装置在工作安全标准内减少噪音。

Reduce noise through a variety of methods, to achieve real standardization compressor, in line with the state standards.

经过种种减小乐音的办法，使紧缩机真正的完成标准化，契合国度规则的规范。

The "civil sound insulation design standards" rule: the conditions agreed to, it is easy to set the noise sources in the open, but not next to the theme in the main building construction or under.

而《民用建筑隔声设计标准》规则：条件答应时，易将噪声源设置在公开，但不宜比邻主题建筑或设在主体建筑下。

The new standards contain strict criteria on acoustic noise as well as visual ergonomics, electromagnetic fields, ecology and energy.

相应的标准除了更新原来的视觉人体工学、电磁场、环保和节能要求以外，又增加了限制噪声的规则。