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GB/T 27763-2011: Acoustics -- Measurement and parametric description of spatial sound distribution curves in workrooms for evaluation of their acoustical performance
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| GB/T 27763-2011 | English | 514 |
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Acoustics -- Measurement and parametric description of spatial sound distribution curves in workrooms for evaluation of their acoustical performance
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GB/T 27763-2011
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Basic data | Standard ID | GB/T 27763-2011 (GB/T27763-2011) | | Description (Translated English) | Acousticsee. Measurement and parametric description of spatial sound distribution curves in workrooms for evaluation of their acoustical performance | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A59 | | Classification of International Standard | 17.140 | | Word Count Estimation | 26,273 | | Date of Issue | 2011-12-30 | | Date of Implementation | 2012-05-01 | | Quoted Standard | GB/T 3241; GB/T 3767-1996; GB/T 3785.1; GB/T 4129; GB/T 6881.1; GB/T 6882 | | Adopted Standard | ISO 14257-2001, IDT | | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | | Summary | This standard specifies a method for measuring a given workplace spatial sound field distribution curve approach. Presents a method for according to the measurement data to determine the expression in the workplace noise control two parameters of the acoustic performance: the sound pressure level relative to the free field over the amount of double the distance attenuation of the sound pressure level. This standard applies to any shape and any size workplace, as long as the number of microphone positions to meet the requirements of regression calculation. This standard does not apply to verbal communication or other psychological aspects of sound quality evaluation. | GB/T 27763-2011: Acoustics -- Measurement and parametric description of spatial sound distribution curves in workrooms for evaluation of their acoustical performance
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Acousticsee. Measurement and parametric description of spatial sound distribution curves in workrooms for evaluation of their acoustical performance
ICS 17.140
A59
National Standards of People's Republic of China
Acoustic acoustic performance evaluation workshop space sound field
Methods of measurement and parameter distribution curve representation
(ISO 14257.2001, IDT)
Issued on. 2011-12-30
2012-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Introduction Ⅲ
Introduction Ⅳ
1 Scope 1
2 Normative references 1
3 Terms and definitions
4 indoor sound field distribution 2
5 measuring spatial sound field distribution curve 4
6 measured sound field distribution curve in the evaluation of workplace acoustic performance when parameter representation 7
Content 7 records and reports 10
Appendix A (normative) Performance test requirements of the sound source 11
Appendix B (normative) consider the ground reflected sound source directivity affect distribution curve measured sound field correction 13
Example 14 Appendix C (informative) Use of this standard
References 21
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard was proposed by the Chinese Academy of Sciences.
This standard by the National Standardization Technical Committee of Acoustics (SAC/TC17) centralized.
This standard was drafted. Tongji University, Communication University of China.
The main drafters of this standard. I Sheng Sheng, Mo Fang Shuo, Mencius thick.
Introduction
According to GB/T 17249.1, spatial sound field distribution within the workplace can be used to express a curve. This curve characterizes the sound pressure level
Leaving a function of the distance between the sound source, the sound source sound power level is known, stable and point source emission is non-directional sound radiation. For the test
Taking into account the room, this standard specifies the determination of the spatial sound field distribution curve and deriving two features of the method. Both feature quantity distance
SPL space doubling of the amount of attenuation and sound pressure level than the amount.
Data obtained using this standard can be used in the following areas.
--- In terms of room acoustics noise control identification;
--- Determine the appropriate machine and work positions in the room;
--- Evaluation of the need for additional sound absorption in the room;
--- Qualitative assessment room loaded barrier potential effects;
--- When the predetermined position to operate the machine known emission values \u200b\u200bin the room, calculate the expected noise.
Acoustic acoustic performance evaluation workshop space sound field
Methods of measurement and parameter distribution curve representation
1 Scope
This standard specifies a method for measuring a given workplace spatial sound field distribution curve. We present a method, based on the number of measurements for
It is expressed in the workplace to determine the acoustic properties in terms of noise control two parameters. relative to the free-field sound pressure level of more than the amount from the doubling of the
SPL attenuation.
This standard applies to any arbitrary shape and size of the workplace, as long as the number of microphone positions to meet the requirements of regression.
This standard does not apply to the sound quality evaluation about language exchanges or other psychological aspects.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 3241 electro-acoustics octave and fractional octave filters (GB/T 3241-2010, IEC 61260.1995, MOD)
Determination of sound power levels of noise sources reflecting plane free field engineering method GB/T 3767-1996 Acoustics sound pressure
(Eqv ISO 3744.1994)
GB/T 3785.1 electric acoustic sound level meters - Part 1. Specification (GB/T 3785.1-2010, IEC 61672-1.2002, IDT) 1)
Standard sound source performance and calibration requirements (GB/T 4129-2003, ISO 6926 GB/T 4129 Acoustics for sound power level measured.
1999, IDT)
Determination of sound power levels of noise sources - Precision methods for reverberation rooms (GB/T 6881.1-2002 GB/T 6881.1 sound pressure,
idt ISO 3741.1999)
GB/T 6882 Determination of sound pressure of sound power levels of noise sources anechoic and semi-anechoic chamber Precision method (GB/T 6882-2008,
ISO 3745.2003, IDT)
1) IEC 60651 and IEC 60804 merging revisions.
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
SPL soundpressurelevel
Lp
Number of sound source radiating sound pressure p and the square of the reference sound pressure (p0 = 20μPa) the ratio of the square base 10 multiplied by 10.
Note 1. The sound pressure level in decibels, dB.
Note 2. should indicate the frequency weighting or bandwidth and time weighting (S, F, or I, see GB/T 3785.1).
3.2
Sound power level soundpowerlevel
LW
Number of sound source acoustic radiation power and the reference sound power (P0 = 10-12 W) ratio of base 10 multiplied by 10.
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