ISO 3744:2010
Withdrawn
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Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Engineering methods for an essentially free field over a reflecting plane
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English, French
22-09-2010
06-01-2026
ISO 3744:2010 specifies methods for determining the sound power level or sound energy level of a noise source from sound pressure levels measured on a surface enveloping the noise source (machinery or equipment) in an environment that approximates to an acoustic free field near one or more reflecting planes. The sound power level (or, in the case of noise bursts or transient noise emission, the sound energy level) produced by the noise source, in frequency bands or with frequency A-weighting applied, is calculated using those measurements.
The methods specified in ISO 3744:2010 are suitable for all types of noise (steady, non-steady, fluctuating, isolated bursts of sound energy, etc.) defined in ISO 12001.
ISO 3744:2010 is applicable to all types and sizes of noise source (e.g. stationary or slowly moving plant, installation, machine, component or sub-assembly), provided the conditions for the measurements can be met.
The test environments that are applicable for measurements made in accordance with ISO 3744:2010 can be located indoors or outdoors, with one or more sound-reflecting planes present on or near which the noise source under test is mounted. The ideal environment is a completely open space with no bounding or reflecting surfaces other than the reflecting plane(s) (such as that provided by a qualified hemi-anechoic chamber), but procedures are given for applying corrections (within limits that are specified) in the case of environments that are less than ideal.
Information is given on the uncertainty of the sound power levels and sound energy levels determined in accordance with ISO 3744:2010, for measurements made in limited bands of frequency and with frequency A-weighting applied. The uncertainty conforms to ISO 12001:1996, accuracy grade 2 (engineering grade).
| Committee |
ISO/TC 43/SC 1
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| DevelopmentNote |
Supersedes ISO 495 (04/2001) Supersedes ISO/DIS 3744. (09/2010) Supersedes ISO 4872. (10/2010) Also numbered as ANSI S12.54. (04/2011)
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| DocumentType |
Standard
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| Pages |
78
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| ProductNote |
THIS STANDARD ALSO REFER-ISO 5725 (all parts)
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| PublisherName |
International Organization for Standardization
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| Status |
Withdrawn
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| SupersededBy | |
| Supersedes | |
| UnderRevision |
| Standards | Relationship |
| GOST R ISO 3744 : 2013 | Identical |
| NF EN ISO 3744 : 2012 | Identical |
| NBN EN ISO 3744 : DEC 2010 | Identical |
| NEN EN ISO 3744 : 2010 | Identical |
| NS EN ISO 3744 : 2010 | Identical |
| I.S. EN ISO 3744:2010 | Identical |
| SAC GB/T 3767 : 1996 | Identical |
| SS-EN ISO 3744:2010 | Identical |
| AS 5335:2019 | Identical |
| BS EN ISO 3744:2010 | Identical |
| EN ISO 3744:2010 | Identical |
| DIN EN ISO 3744:2011-02 | Identical |
| ASA/ANSI S12.54/ISO 3744:2010(R2025) | Identical |
| IS/ISO 8528 : Part 10 : 2022 | Identical |
| UNE-EN ISO 3744:2010 | Equivalent |
| NBN ISO 3744 : 1992 | Identical |
| UNE 74034:1988 | Identical |
| BS ISO 3744 : 1994 AMD 8936 | Identical |
| UNE-EN ISO 3744:2011 | Identical |
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