ETS 300753 解读
ETS 300753: Acoustic noise emitted by telecommunications equipment.
TC EE ( Environmental Engineering)环境工程技术委员会，定义那些（包含安装在用户端的）电信设备的关于环境和基础方面的标准。主要包括环境条件和环境测试、供电问题和机械结构三个领域。
采用ISO 7779 作为主要测量文件。
86/188 / EEC 。
测量方法。 ISO 9296 规定了解决这些问题的方法，因此
在本ETS中规定为声明声功率值的方法。 ISO 9296 也规定了一个
To develop practical specifications and to have the capacity to make fair comparisons between equipment, it is essential to have a single, technically established method for the measurement of acoustic emission. Therefore, this ETS specifies the use of sound power measurement and, more specifically, adopts ISO 7779  as the primary measurement document. Sound power levels can be used for direct comparison of noise emission for functionally similar equipment manufactured by different vendors, and/or in the calculation of estimated sound pressure levels for spaces where the equipment is to be installed. The use of sound power level, instead of emission sound pressure level, as the specified quantity for product noise emission has clear precedent within the international noise control community. The acceptability of the acoustic emission from a piece of equipment depends upon a number of details that vary from installation to installation, and the number of possible installations is extensive. Accordingly, the goal of this ETS is to specify limits that are applicable to the major installation categories. The fundamental concern prompting the development of this ETS is the potential adverse impact that excessive equipment noise can have on people. For that reason, the impact of noise upon human activities has been carefully considered, and the intent has been to ensure that the acoustic noise emitted is at, or below, generally accepted levels. The perceptual issues considered included task concentration, speech communication, annoyance and other similar parameters. Generally, the relevant noise exposure levels are well below those needed to ensure worker safety and health. Requirements related to worker safety and health (including those related to infrasound and ultrasound) can be found in EEC Directive 86/188/EEC . This ETS specifies that manufacturers report measured A-weighted sound power values for equipment. Given that it is impractical and unnecessary to measure every manufactured unit, the reported sound power value should be one that all, or nearly all, units of a particular model will not exceed. This means that the reported value needs to take into account both production variation and the precision of the measurement method. ISO 9296  specifies methods that address these issues and is therefore specified in this ETS as the method for declaring sound power values. ISO 9296  also specifies a method for verification of declared sound power values.
Industry standards which cover acoustic noise testing include:
- ISO 9296
- ISO 7779
- ISO 3744
- ETSI EN 300 753
- IEC 60601
- MIL-STD-1474D (previously MIL-STD-740).