SFS-EN ISO 3746:en

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ISO 3746:2010 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 a noise source (machinery or equipment) in a test environment for which requirements are given. The sound power level (or, in the case of noise bursts or transient noise emission, the sound energy level) produced by the noise source with frequency A-weighting applied is calculated using those measurements.
The methods specified in ISO 3746:2010 are suitable for all types of noise (steady, non-steady, fluctuating, isolated bursts of sound energy, etc.) defined in ISO 12001.
ISO 3746:2010 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 3746:2010 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.
Information is given on the uncertainty of the sound power levels and sound energy levels determined in accordance with ISO 3746:2010, for measurements made with frequency A-weighting applied. The uncertainty conforms with that of ISO 12001:1996, accuracy grade 3 (survey grade).

Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).

Sisällysluettelo

Foreword
Introduction
1 Scope

1.1 General
1.2 Types of noise and noise sources
1.3 Test environment
1.4 Measurement uncertainty

2 Normative references
3 Terms and definitions
4 Test environment

4.1 General
4.2 Criterion for background noise
4.3 Criterion for acoustic adequacy of test environment

5 Instrumentation

5.1 General
5.2 Calibration

6 Definition, location, installation and operation of noise source under test

6.1 General
6.2 Auxiliary equipment
6.3 Noise source location
6.4 Mounting of the noise source
6.5 Operation of source during test

7 Reference box and measurement surface

7.1 Reference box
7.2 Measurement surface

8 Determination of sound power levels and sound energy levels

8.1 Determination of environmental correction
8.2 Microphone positions on the measurement surface
8.3 Determination of sound power levels
8.4 Determination of sound energy levels

9 Measurement uncertainty

9.1 Methodology
9.2 Determination of σomc
9.3 Determination of σR0
9.4 Typical upper bound values of σR0
9.5 Total standard deviation σtot and expanded measurement uncertainty U

10 Information to be recorded

10.1 General
10.2 Noise source under test
10.3 Test environment
10.4 Instrumentation
10.5 Acoustical data

11 Test report

Annex A Determination of the environmental correction (normative)
Annex B Microphone arrays on a hemispherical measurement surface (normative)
Annex C Microphone arrays on a parallelepiped measurement surface (normative)
Annex D Guidelines on the development of information on measurement uncertainty (informative)

Bibliography

Näytä kaikki

Tuoteryhmä(t)

17.140.01 Akustiset mittaukset ja meluntorjunta yleensä »

Sidokset

Velvoittavat viittaukset

IEC 60942:2003
IEC 61672-1:2002
ISO 12001:1996 Acoustics -- Noise emitted by machinery and equipment -- Rules for the drafting and presentation of a noise test code

Tekninen komitea

CEN/TC 211 Acoustics »

Direktiivi

89/392/EEC
98/37/EC Koneturvallisuus
2006/42/EC Koneturvallisuus

http://ec.europa.eu »

Vahvistuspäivä

24.01.2011

Julkaisupäivä

11.02.2011

Painos

3

Sivumäärä

53

Julkaisun kieli

englanti