ISO 7779-2018 PDF

Full title and description

ISO 7779:2018 — Acoustics — Measurement of airborne noise emitted by information technology and telecommunications equipment. This International Standard specifies procedures for measuring and reporting the airborne noise emitted by information technology (IT) and telecommunications equipment, using A‑weighted sound power levels and emission sound pressure levels to allow comparison and declaration of noise performance.

Abstract

This standard defines measurement methods for the noise emission of IT and telecommunications equipment. It describes use of the A‑weighted sound power level as the primary declared quantity, supplemented by A‑weighted emission sound pressure levels at operator and bystander positions. The document references basic noise emission standards (ISO 3741, ISO 3744, ISO 3745 and ISO 11201) and gives procedures to identify prominent discrete tones (see Annex D). The methods are intended for type tests and for producing comparable results between manufacturers and test laboratories.

General information

• Status: Published (International Standard, confirmed).
• Publication date: November 2018 (published 2018‑11; edition released November 16, 2018).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 35.020 (Information technology), 17.140.20 (Noise emitted by machines and equipment).
• Edition / version: Edition 4 (2018).
• Number of pages: 69 pages.

Scope

ISO 7779:2018 applies to measurement and reporting of airborne noise emitted by individual functional units of information technology and telecommunications equipment. It provides procedures to determine A‑weighted sound power levels and emission sound pressure levels for broadband, narrow‑band, discrete‑frequency and impulsive noise, and gives guidance on selection of basic noise emission methods (reverberation room or anechoic/free‑field over a reflecting plane) for type testing and declaration purposes. The standard is aimed at producing comparable, reproducible results for manufacturers and testing laboratories.

Key topics and requirements

• Primary declared quantity: A‑weighted sound power level (useful for comparing equipment).
• Supplementary measurement: A‑weighted emission sound pressure level at operator and bystander positions.
• Permitted basic measurement methods: ISO 3741 (reverberation test room), ISO 3744 / ISO 3745 (essentially free field over a reflecting plane) — any of these may be selected in accordance with the standard.
• Procedures for detection and evaluation of prominent discrete tones (Annex D).
• Intended use: type tests, manufacturer noise declaration and comparative testing; not a direct predictor of installed noise immission at a workstation.

Typical use and users

Manufacturers of IT and telecommunications equipment, independent testing laboratories, acoustical consultants, product designers, procurement/specification engineers and certification bodies use ISO 7779 to quantify and declare equipment noise emissions, to support product comparison, and to inform installation decisions and acoustic design. Test laboratories use it to produce repeatable, comparable measurements for type‑testing and product data sheets.

Related standards

Key related standards referenced by ISO 7779 include the basic noise emission test codes ISO 3741 (reverberation room), ISO 3744 and ISO 3745 (free‑field over reflecting plane), the operator/bystander sound pressure standard ISO 11201, and noise declaration/reporting guidance such as ISO 9296. ISO 7779:2018 replaces earlier editions of ISO 7779 (2010, 1999).

Keywords

acoustics; noise emission; information technology equipment; telecommunications equipment; sound power level; emission sound pressure level; A‑weighted; type test; ISO 3741; ISO 3744; ISO 3745; ISO 11201; ISO 9296.

FAQ

Q: What is this standard?

A: ISO 7779:2018 is an international standard that specifies procedures for measuring and reporting airborne noise emitted by information technology and telecommunications equipment, using A‑weighted sound power and emission sound pressure levels.

Q: What does it cover?

A: It covers measurement methods for sound power and emission sound pressure levels (operator/bystander positions), selection among basic noise emission methods (ISO 3741, ISO 3744, ISO 3745), and procedures to identify prominent discrete tones; it is intended for type testing and noise declaration.

Q: Who typically uses it?

A: Equipment manufacturers, test laboratories, acoustic consultants, procurement/specification engineers and certification bodies use the standard for declaring, comparing and verifying equipment noise emissions.

Q: Is it current or superseded?

A: ISO 7779:2018 is the current published edition (fourth edition, published November 2018) and supersedes earlier editions (for example ISO 7779:2010 and ISO 7779:1999). The standard was issued by ISO and remains the authoritative edition unless a later revision is published.

Q: Is it part of a series?

A: It is part of the family of basic noise emission and acoustics test codes (ISO 3741, ISO 3744, ISO 3745, ISO 11201) and is used together with ISO 9296 for noise declaration and reporting of IT equipment.

Q: What are the key keywords?

A: Acoustics; noise emission; sound power level; emission sound pressure level; A‑weighting; information technology equipment; telecommunications equipment; type test; discrete tones.