本文介绍了一种用加热金属丝来产生噪声的微波标准噪声源。
In this paper a microwave standard noise source which produces noise by healing a metal filament is described.
对如何确定空气调节设备噪声的标准、声源点及测定方法提出若干建议。
Presents several proposals as how to specify the noise criteria, noise source point and measurement method for air conditioning equipment.
采用白噪声信号作为标准声源的输入信号，在常温无气流条件下对消声器实物模型进行了静态放声试验。
After a white noise signal has been taken as the input of a standard sound source, a static acoustic test is conducted for a prototype silencer without air flow and at the normal temperature.
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 "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.
为有效地控制城市噪声污染的程度和范围 ，便于城市环境噪声管理和促进噪声源治理 ，城市区域环境噪声标准适用区划分 （以下简称“噪声区划”）势在必行 。
In order to effectively control the degree and scope of city noise pollution, strengthen city environmental noise management and promote noise control, city environmental noise division is necessary.
为有效地控制城市噪声污染的程度和范围 ，便于城市环境噪声管理和促进噪声源治理 ，城市区域环境噪声标准适用区划分 （以下简称“噪声区划”）势在必行 。
In order to effectively control the degree and scope of city noise pollution, strengthen city environmental noise management and promote noise control, city environmental noise division is necessary.
应用推荐