DIN ETS 300753-1998
设备工程.电信设备产生的噪声
Equipment Engineering (EE) - Acoustic noise emitted by telecommunications equipment; English version ETS 300753:1997
DIN ETS 300753-1998 中，可能用到以下仪器设备
非常抱歉，我们暂时无法提供预览，您可以试试： 免费下载 DIN ETS 300753-1998 前三页，或者稍后再访问。
点击下载后，生成下载文件时间比较长，请耐心等待......
- 标准号
- DIN ETS 300753-1998
- 发布日期
- 1998年08月
- 实施日期
- 废止日期
- 无
- 中国标准分类号
- M04
- 国际标准分类号
- 17.140.20;33.050.01
- 发布单位
- DE-DIN
- 适用范围
- The document specifies acoustic noise emission limits for equipment used in telecommunication locations as specified in the ETS 300019-1 series. This ETS covers switching, transmission, power, supervisory, as well tariff and billing equipment. It also specifies methods for measuring, reporting and verifying the noise emission of telecommunications equipment. The details of the methods are found in ISO 7779 and ISO 9296. The descriptor used to quantify acoustic noise emission is the declared A-weighted sound power level in units of bels.#,,#