SFS-EN ISO 3743-2:2019:en

Soveltamisala

Suomenkielistä soveltamisalaa ei ole saatavissa.

ISO 3743-2:2018 specifies a relatively simple engineering method for determining the sound power levels of small, movable noise sources. The methods specified in this document are suitable for measurements of all types of noise within a specified frequency range, except impulsive noise consisting of isolated bursts of sound energy which are covered by ISO 3744 and ISO 3745.
NOTE A classification of different types of noise is given in ISO 12001.

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

Sisällysluettelo

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Noise source
6 Requirements for special reverberation test room

6.1 General
6.2 Volume of test room
6.3 Reverberation time of test room
6.4 Surface treatment
6.5 Criterion for background noise
6.6 Criteria for temperature and humidity
6.7 Evaluation of suitability of test room

7 Instrumentation

7.1 General
7.2 Microphone and its associated cable
7.3 Amplifier and weighting network
7.4 Octave-band filters
7.5 Squaring and averaging circuits and indicating device
7.6 Frequency response of the instrumentation system
7.7 Calibration

8 Installation and operation of source under test

8.1 General
8.2 Source location
8.3 Source mounting
8.4 Auxiliary equipment
8.5 Operation of source during the test

9 Measurements in test room

9.1 General
9.2 Period of observation
9.3 Microphone positions
9.4 Number of microphones and source positions
9.5 Criteria for the presence of spectral irregularities
9.6 Averaging technique with moving microphones
9.7 Array of fixed microphones
9.8 Correction for background sound pressure levels

10 Calculation of sound power levels

10.1 Calculation of mean band pressure levels
10.2 Direct method for determining sound power levels
10.3 Comparison method for determining band power levels
10.4 A-weighted sound power levels determined by the comparison method

11 Measurement uncertainty

11.1 Methodology
11.2 Determination of σomc
11.3 Determination of σR0
11.4 Typical upper bound values of σR0
11.5 Total standard deviation σtot and expanded uncertainty U

12 Information to be recorded

12.1 General
12.2 Sound source under test
12.3 Acoustical environment
12.4 Instrumentation
12.5 Acoustical data

13 Information to be reported

Annex A Characteristics and calibration of reference sound source (normative)
Annex B Guidelines for the design of special reverberation test rooms (informative)
Annex C Examples of suitable instrumentation systems (informative)
Annex D Guidance on the development of information on measurement uncertainty (informative)
Annex E Sound power level under reference meteorological conditions (normative)
Annex F Calculation of A-weighted sound power levels from octave band levels (normative)

Bibliography

Näytä kaikki

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Noise source
6 Requirements for special reverberation test room

6.1 General
6.2 Volume of test room
6.3 Reverberation time of test room
6.4 Surface treatment
6.5 Criterion for background noise
6.6 Criteria for temperature and humidity
6.7 Evaluation of suitability of test room

7 Instrumentation

7.1 General
7.2 Microphone and its associated cable
7.3 Amplifier and weighting network
7.4 Octave-band filters
7.5 Squaring and averaging circuits and indicating device
7.6 Frequency response of the instrumentation system
7.7 Calibration

8 Installation and operation of source under test

8.1 General
8.2 Source location
8.3 Source mounting
8.4 Auxiliary equipment
8.5 Operation of source during the test

9 Measurements in test room

9.1 General
9.2 Period of observation
9.3 Microphone positions
9.4 Number of microphones and source positions
9.5 Criteria for the presence of spectral irregularities
9.6 Averaging technique with moving microphones
9.7 Array of fixed microphones
9.8 Correction for background sound pressure levels

10 Calculation of sound power levels

10.1 Calculation of mean band pressure levels
10.2 Direct method for determining sound power levels
10.3 Comparison method for determining band power levels
10.4 A-weighted sound power levels determined by the comparison method

11 Measurement uncertainty

11.1 Methodology
11.2 Determination of σomc
11.3 Determination of σR0
11.4 Typical upper bound values of σR0
11.5 Total standard deviation σtot and expanded uncertainty U

12 Information to be recorded

12.1 General
12.2 Sound source under test
12.3 Acoustical environment
12.4 Instrumentation
12.5 Acoustical data

13 Information to be reported

Annex A Characteristics and calibration of reference sound source (normative)
Annex B Guidelines for the design of special reverberation test rooms (informative)
Annex C Examples of suitable instrumentation systems (informative)
Annex D Guidance on the development of information on measurement uncertainty (informative)
Annex E Sound power level under reference meteorological conditions (normative)
Annex F Calculation of A-weighted sound power levels from octave band levels (normative)

Bibliography

Tuoteryhmä(t)

17.140.01 Akustiset mittaukset ja meluntorjunta yleensä »

Sidokset

Velvoittavat viittaukset

IEC 60942:2017 Electroacoustics - Sound calibrators
IEC 61260-1:2014 Electroacoustics - Octave-band and fractional-octave-band filters - Part 1: Specifications
IEC 61260-2 AMD 1:2017

IEC 60942:2017 Electroacoustics - Sound calibrators
IEC 61260-1:2014 Electroacoustics - Octave-band and fractional-octave-band filters - Part 1: Specifications
IEC 61260-2 AMD 1:2017
IEC 61260-2 Edition 1.1:2017
IEC 61260-2:2016 Electroacoustics - Octave-band and fractional-octave-band filters - Part 2: Pattern-evaluation tests
IEC 61260-3:2016 Electroacoustics - Octave-band and fractional-octave-band filters - Part 3: Periodic tests
IEC 61672-1:2013 Electroacoustics - Sound level meters - Part 1: Specifications
ISO 3741:2010 Acoustics -- Determination of sound power levels and sound energy levels of noise sources using sound pressure -- Precision methods for reverberation test rooms
ISO 3743-1:2010 Acoustics -- Determination of sound power levels and sound energy levels of noise sources using sound pressure -- Engineering methods for small movable sources in reverberant fields -- Part 1: Comparison method for a hard-walled test room
ISO 3745:2012 Acoustics -- Determination of sound power levels and sound energy levels of noise sources using sound pressure -- Precision methods for anechoic rooms and hemi-anechoic rooms
ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results -- Part 1: General principles and definitions
ISO 5725-1:1994/Cor 1:1998
ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results -- Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
ISO 5725-2:1994/Cor 1:2002
ISO 5725-3:1994 Accuracy (trueness and precision) of measurement methods and results -- Part 3: Intermediate measures of the precision of a standard measurement method
ISO 5725-3:1994/Cor 1:2001
ISO 5725-4:1994 Accuracy (trueness and precision) of measurement methods and results -- Part 4: Basic methods for the determination of the trueness of a standard measurement method
ISO 5725-5:1998 Accuracy (trueness and precision) of measurement methods and results -- Part 5: Alternative methods for the determination of the precision of a standard measurement method
ISO 5725-5:1998/Cor 1:2005
ISO 5725-6:1994 Accuracy (trueness and precision) of measurement methods and results -- Part 6: Use in practice of accuracy values
ISO 5725-6:1994/Cor 1:2001
ISO 6926:2016 Acoustics -- Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels
ISO/IEC Guide 98-3:2008 Uncertainty of measurement -- Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)

Tekninen komitea

CEN/TC 211 Acoustics »

Direktiivi

2006/42/EC Koneturvallisuus

http://ec.europa.eu »

Vahvistuspäivä

04.10.2019

Julkaisupäivä

08.10.2019

Painos

2

Sivumäärä

46

Julkaisun kieli

englanti