ISO 13347-4-2004 cor1-2006 PDF

Full title and description

St ISO 13347-4-2004 cor1-2006 — Industrial fans — Determination of fan sound power levels under standardized laboratory conditions — Part 4: Sound intensity method (ISO 13347-4:2004 with Technical Corrigendum 1:2006). The corrigendum (Cor 1:2006) provides editorial and technical corrections to the 2004 edition and is issued as a short correction sheet to the published Part 4.

Abstract

This document (the 2006 corrigendum to ISO 13347-4:2004) amends the original 2004 Part 4 procedure for determining airborne sound power from industrial fans by the sound‑intensity method. The underlying Part 4 standard defines measurement surfaces, environmental and ambient‑noise requirements, number and positioning of intensity scans and reporting formats; the corrigendum corrects and clarifies specific technical and editorial items in that text.

General information

• Status: Withdrawn / superseded (original edition withdrawn; corrigendum applied to the 2004 edition).
• Publication date: Original: August 2004; Corrigendum (Cor 1): 2006 (issued October–November 2006 by national bodies).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 17.140.20, 23.120 (acoustics; fans).
• Edition / version: Edition 1 (2004) with Technical Corrigendum 1 (2006).
• Number of pages: Original Part 4 document: 25 pages; Corrigendum: 2 pages (correction sheet).

Scope

Applies to industrial fans as defined in associated fan standards and covers determination of airborne sound power under specified laboratory set‑ups using the sound‑intensity measurement method. The scope is limited to airborne sound emission (vibration effects are not measured) and to test arrangements intended to represent practical installations in laboratory conditions. The standard is intended to be used alongside related ISO fan standards (for example ISO 5801 and other parts of ISO 13347).

Key topics and requirements

• Measurement principle: determination of sound power using sound intensity scanning on a measurement surface enclosing the fan.
• Acoustical environment and ambient noise limits required for valid measurements.
• Specification of measurement surface geometry, spacing and number of intensity measurement positions and scans.
• Procedures for data reduction, averaging and reporting of sound power levels for specified test set‑ups.
• References to other parts of the ISO 13347 series and to ISO 5801 for installation/set‑up definitions.

These topics (and corrections covered by Cor 1:2006) are summarized and implemented in the corrigendum to clarify procedural or editorial errors in the 2004 text.

Typical use and users

Used by fan and ventilation equipment manufacturers, acoustic test laboratories, certification bodies, product compliance teams, and acoustical consultants performing standardized laboratory sound power measurements for industrial fans or for comparative product evaluation. National standards bodies and testing laboratories implementing ISO fan‑testing programs also reference the corrigendum when using the 2004 Part 4 procedure.

Related standards

Part of the ISO 13347 series (other parts cover alternative measurement methods and set‑ups) and closely related to ISO 5801 (fan test codes) and national adoptions of ISO 13347 parts. Subsequent editions and a new edition of Part 4 were issued (superseding the 2004 edition and its corrigendum).

Keywords

industrial fans; sound power; sound intensity; acoustics; noise measurement; fan testing; ISO 13347; corrigendum; correction sheet.

FAQ

Q: What is this standard?

A: It is the technical corrigendum (Cor 1:2006) to ISO 13347‑4:2004 — the ISO Part 4 procedure for determining fan sound power by the sound‑intensity method, i.e., a short correction sheet issued to amend the 2004 edition.

Q: What does it cover?

A: It corrects and clarifies specific technical and editorial items in the 2004 Part 4 text; the underlying Part 4 standard defines how to measure airborne sound power from industrial fans using sound intensity scans, environmental and ambient‑noise requirements, measurement surface specifications and reporting.

Q: Who typically uses it?

A: Fan manufacturers, accredited acoustic test laboratories, certification bodies, acoustical engineers and national standards organizations that perform or specify standardized laboratory sound power tests for industrial fans.

Q: Is it current or superseded?

A: The 2004 edition (with Corrigendum 1:2006) has been withdrawn and superseded by a later edition of ISO 13347‑4 (a 2025 edition was published to replace the earlier text). Users are advised to apply the most recent edition (or the national adoption of that edition) for current testing and compliance.

Q: Is it part of a series?

A: Yes — ISO 13347 is a multipart series addressing methods for determination of fan sound power levels under standardized laboratory conditions (Part 1, Part 2, Part 3, Part 4, etc.); Part 4 is the sound‑intensity method within that series.

Q: What are the key keywords?

A: Industrial fans, sound power, sound intensity, acoustics, noise measurement, fan testing, ISO 13347, corrigendum.