Three basic noise emission standards for determination of the sound power levels are specified in this document in order to avoid undue restriction on existing facilities and experience.

2024年5月2日 · 内容提示： bsi 标准出版物信息技术和电信设备发出的噪⾳声学空⽓传播噪声的测量bs en iso 7779:2018tÜv rx tÜv rx tÜv rx machine translationtÜv rx tÜv rx tÜv rx machine translationtÜv rx tÜv rx tÜv rx machine translationtÜv rx tÜv rx tÜv rx machine translationtÜv rx tÜv rx tÜv rx machine translationtÜv rx tÜv rx tÜv rx machine translationtÜv rx ...

In order to ensure accuracy, validity and acceptability, this document is based on the basic International Standards for determination of the sound power level and for determination of the emission sound pressure level at the operator position and bystander positions.

This fourth edition cancels and replaces the third edition (ISO 7779:2010), which has been technically revised. The main changes compared to the previous edition are as follows:

ISO 7779:2010 specifies procedures for measuring and reporting the noise emission of information technology and telecommunications equipment. The basic emission quantity is the A-weighted sound power level which may be used for comparing equipment of the same type but from different manufacturers, or for comparing different equipment.

2025年3月31日 · 本文件规定了确定声功率级的三个基本噪声排放标准，以避免对现有设施和经验的不当限制。 iso 3741 规定了混响测试室中的比较测量； iso 3744 和 iso 3745 规定了反射平面上基本自由场中的测量。

2018年11月16日 · 为了避免对现有设施和经验的过度限制，本文件规定了确定声功率级的三个基本噪声排放标准。iso 3741规定了混响试验室中的比较测量；iso 3744和iso 3745规定了反射面上基本自由场的测量。

International Standard ISO 7779 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise. This second edition of ISO 7779 cancels and replaces the first edition (ISO 7779:1988), which has been technically

2017年12月27日 · iso 7779-2018 Acoustics — Measurement of airborne noise emitted by information technology and telecommunications equipment 声学 - 信息技术和电信设备发射的空中噪声测量

2025年3月28日 · ISO 7779:2018的标准全文信息,本文件规定了测量和报告信息技术和电信设备噪声排放的程序。 注 1：本文件被视为此类设备噪声测试规范（见 3.1.2）的一部分，并且基于基本噪声排放标准（见 3.1.1）ISO 3741、ISO 3744、ISO 3745、ISO 9295 和 ISO 11201. 基本排放量是.