ISO 13347-2:2004 PDF

Industrial fans — Determination of fan sound power levels under standardized laboratory conditions — Part 2: Reverberant room method

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Title (English):

ISO 13347-2:2004

Industrial fans — Determination of fan sound power levels under standardized laboratory conditions — Part 2: Reverberant room method

Document status:: Withdrawn
Format:: Electronic (PDF)
Number of pages:: 22
Publication date:: August 17, 2004
Edition:: ISO IS 13347 edition 1 version 1
ICS:: 17.140.20

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Description (English):

ISO 13347-2:2004 gives a detailed description of reverberant room methods for the determination of fan sound power levels. It is for use under standardized laboratory conditions and recognises that tests in situ are subject to increased uncertainty. These test procedures are not necessarily appropriate to site test conditions. Acoustic system effects are presently the subject of considerable research effort. ISO 5136, which covers the in-duct method, and ISO 10302 for small fans, should be used in conjunction with ISO 13347-2:2004.

Technical details

Technical committee: ISO/TC 117 - Fans
SKU: ISO 13347-2:2004

Abstract

Overview

ISO 13347-2:2004 - “Industrial fans - Determination of fan sound power levels under standardized laboratory conditions - Part 2: Reverberant room method” - specifies a laboratory method for measuring the sound power levels of industrial fans using a reverberant room. The standard defines test environments, instrumentation and procedures (based on a reference sound source (RSS) substitution method) to produce engineering‑grade sound power data in one‑third octave bands. It is intended for standardized laboratory conditions and is not a field/site test method.

Key topics and technical requirements

Reverberant room qualification: Test rooms must meet the qualification criteria given in Annex A (broad‑band sources) and Annex B (narrow‑band/pure tones) before use.
Substitution method with RSS: Sound power of the fan is determined by substituting measurements from a calibrated reference sound source (RSS) and comparing measured sound pressure levels.
Measurement quantities: One‑third octave sound pressure levels at prescribed microphone positions or along specified paths, plus fan aerodynamic data (rotational speed, pressure, flowrate).
Test configurations: Covers the four ISO 5801 installation types - A (free inlet/free outlet), B (free inlet/ducted outlet), C (ducted inlet/free outlet) and D (ducted inlet/ducted outlet) - and allows for tests of fan inlet, outlet and casing sound power.
Instrumentation & calibration: Instrumentation requirements are referenced to ISO 13347-1 and related ISO acoustics standards; the RSS must be calibrated and maintained.
Limitations: Not intended for in‑situ measurements (increased uncertainty); vibration effects are not measured; reverberant tests generally require the test object to be

Related standards

Mentioned in the description and other ISO standards

Overview

Key topics and technical requirements

Reverberant room qualification: Test rooms must meet the qualification criteria given in Annex A (broad‑band sources) and Annex B (narrow‑band/pure tones) before use.
Substitution method with RSS: Sound power of the fan is determined by substituting measurements from a calibrated reference sound source (RSS) and comparing measured sound pressure levels.
Measurement quantities: One‑third octave sound pressure levels at prescribed microphone positions or along specified paths, plus fan aerodynamic data (rotational speed, pressure, flowrate).
Test configurations: Covers the four ISO 5801 installation types - A (free inlet/free outlet), B (free inlet/ducted outlet), C (ducted inlet/free outlet) and D (ducted inlet/ducted outlet) - and allows for tests of fan inlet, outlet and casing sound power.
Instrumentation & calibration: Instrumentation requirements are referenced to ISO 13347-1 and related ISO acoustics standards; the RSS must be calibrated and maintained.
Limitations: Not intended for in‑situ measurements (increased uncertainty); vibration effects are not measured; reverberant tests generally require the test object to be

ISO 13347-2:2004 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

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