ETS 300753 解读

ETS 300753: Acoustic noise emitted by telecommunications equipment.

ETS 欧洲电信标准协会，所以这个标准是欧标。

文档封面上注有：

Source: ETSI-TC-EE

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。

制定实用的规范，并有能力进行公平的比较

设备，必须有一个单一的，技术上建立的声学测量方法

排放。因此，ETS规定了声功率测量的使用，更具体地说，

采用ISO 7779 [1]作为主要测量文件。

声功率级可用于功能类似设备的噪声发射的直接比较

由不同供应商制造，和/或计算空间的估计声压级

设备的安装位置。使用声功率级，而不是发射声压

因为产品噪声排放的规定量在国际上已经有了明确的先例

噪音控制社区。

一台设备的声发射的可接受性取决于许多细节

从安装到安装各不相同，可能的安装数量也很多。因此，

此ETS的目标是指定适用于主要安装类别的限制。

促使ETS发展的根本关注是潜在的不利影响

过多的设备噪音可能会对人产生影响因为这个原因，噪音对人的影响

活动一直在认真考虑，而且意图是确保发出的声响

处于或低于普遍接受的水平。考虑的感知问题包括任务集中，

语音交流，烦恼和其他类似的参数。一般来说，相关的噪音暴露

水平远低于确保工人安全和健康所需的水平。有关工人的要求

在EEC指令中可以找到安全和健康（包括与次声和超声有关的）

86/188 / EEC [4]。

ETS指定制造商报告设备的测量的A加权声功率值。

鉴于测量每个制造单位是不切实际和不必要的，所报告的声音

功率值应该是一个特定模型的全部或几乎全部单位不会超过的值。意即

报告的价值需要考虑生产变化和精确度

测量方法。 ISO 9296 [2]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 [2]也规定了一个

验证声明的声功率值的方法。

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 [1] 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 [4]. 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 [2] specifies methods that address these issues and is therefore specified in this ETS as the method for declaring sound power values. ISO 9296 [2] 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
  • GR-63-CORE
  • ETSI EN 300 753
  • IEC 60601
  • MIL-STD-1474D (previously MIL-STD-740).