Standard Briefing:Stadard ID: GB/T 4959-2011 Stadard Title: Methods of measurement for the characteristics of sound reinforcement in auditoria Price (USD): 689 Lead day (Deliver True-PDF English version): 5 days [Need to translate] Status: ValidEvolution and Historical Versions:
Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
GB/T 4959-2011 | English | 689 |
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Methods of measurement for the characteristics of sound reinforcement in auditoria
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GB/T 4959-2011
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GB/T 4959-1995 | English | 559 |
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Methods of measurement for the characteristics of sound reinforcement in auditoria
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GB/T 4959-1995
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GB 4959-1985 | English | RFQ |
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Methods of measurement for the characteristics of sound reinforcement in auditoria
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Basic Data: Standard ID | GB/T 4959-2011 (GB/T4959-2011) | Description (Translated English) | Methods of measurement for the characteristics of sound reinforcement in auditoria | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | M72 | Classification of International Standard | 33.160.99 | Word Count Estimation | 30,330 | Date of Issue | 2011-10-31 | Date of Implementation | 2012-02-01 | Older Standard (superseded by this standard) | GB/T 4959-1995 | Quoted Standard | GB/T 3421-2010; GB/T 3785.1; GB/T 3785.2; GB/T 6278; GB/T 9401-1988; GB/T 15508-1995; GBJ 76; SJ/T 10724-1996 | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | Summary | This standard specifies the hall sound system with acoustic characteristics measurement method. This standard applies to the various halls equipped with PA system (such as theaters, multi-purpose hall, conference hall, gymnasium and other similar places) measuring the acoustic characteristics. Measuring the acoustic characteristics of the stadium can refer. |
GB/T 4959-2011
Methods of measurement for the characteristics of sound reinforcement in auditoria
ICS 33.160.99
M72
National Standards of People's Republic of China
Replacing GB/T 4959-1995
Hall Reinforcement Characteristic Measurement
Issued on. 2011-10-31
2012-02-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Preface Ⅰ
1 Scope 1
2 Normative references 1
3 Terms and definitions
4 Measurement Condition 3
5 4 measuring instruments
5.1 General 4
5.2 audio signal generator 4
Noise signal generator 4 5.3
5.4 limiter 5
5.5 Test power amplifier 5
5.6 Test microphone 5
5.7 measuring amplifier 5
5.8 1/3 octave band pass filter 5
5.9 Sound Level Recorder 5
5.10 6 Sound Level Meter
5.11 audible frequency spectrometer 6
5.12 Oscilloscope 6
5.13 audio voltmeter 6
5.14 Test the sound source 6
5.15 6 analog program signal
5.16 meter 6 speech transmission index
5.17 Analysis of accuracy and performance to meet the requirements of computer software 7
6 Measurement 7
6.1 Reinforcement Characteristic Measurement Method 7
6.2 with the sound characteristics of the measurement items 13
6.3 and speech intelligibility measurements related to 15
7 Measurement Report 19
Appendix A (normative) of each point or each band sound pressure arithmetic average calculation method 20
Appendix B (normative) Conversion Maximum SPL measured values \u200b\u200bof several 21
Annex C (normative) speech transmission index (STI) method accuracy and limits 22
Annex D (informative) Room Acoustics Speech Transmission Index (RASTI) method accuracy and limits 23
Appendix E (normative) PA system speech transmission index (STIPA) method accuracy and limits 25
Relations Appendix F (informative) associated with the intelligibility of speech transmission quality and STI index of 26
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB/T 4959-1995 "Hall Reinforcement Characteristic Measurement Method."
This standard and GB/T 4959-1995 compared to the main changes are as follows.
a) part of the PA system adds a digital processor and other digital equipment (1995 Chapter 3 standard; this standard 3.1);
b) The maximum sound level expressed in quasi-peak can be adjusted to a predetermined test signal crest factor RMS SPL peak SPL
Or quasi-peak SPL representation (1995 standard 6.1.3; 6.1.4 of this standard);
c) increase the "Early late sound energy ratio" measurement (see 6.1.8);
d) increase the "total system noise level" measurement (see 6.1.6);
e) time distribution measuring reflected sound increases measurement MLS signal (see 6.2.2.1);
f) The term "RASTI" by the name of "quick speech transmission index" to "room acoustics speech transmission index" (1995 standard
3.6; 3.16 of this standard);
g) "RASTI" measured by the applicable "There are sound" and "no sound" is adjusted to apply only to "no sound" (1995 standard 6.3.1;
6.3.3 of this standard);
h) Increase suitable for "There reinforcement" of "STIPA" measurement (see 6.3.4);
i) Measuring instruments increased testing software (see 5.17);
j) All measurements adjusted to the measuring principle circuit diagram of a block diagram (Fig. 1 standard in 1995 to 11; this standard Figs. 1 to 16);
k) increase the "Measurement Report" prepared by the requirements of section (see Chapter 7);
l) increased the normative appendix "or the measuring point for each band sound pressure arithmetic average calculation method" (see Appendix A);
m) increased the normative appendix "maximum sound pressure level of several measuring magnitude conversion" (see Appendix B);
n) increases the normative appendix "speech transmission index (STI) method accuracy and limits" (see Appendix C);
o) increased the informative appendix "Room Acoustics Speech Transmission Index (RASTI) method accuracy and limits" (see Appendix D);
p) increased normative appendix "sound system speech transmission index (STIPA) method accuracy and limits" (see Appendix E);
q) increase the "relationship with the intelligibility of speech transmission quality and related STI Index" informative annex (see Appendix F).
The standard proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This standard by the national audio, video and multimedia systems and equipment Standardization Technical Committee (TC/SAC242) centralized.
This standard drafting units. China Electronics Technology Group Corporation Institute, the Design Institute of Radio Film and Television acoustic set
UIS, China Entertainment Technology Association.
Participated in the drafting of this Standard. China Electronics Standardization Institute, Chinese Academy of Sciences Institute of Acoustics, Beijing Tsinghua Urban Planning and Design
Total acoustic design Institute of Sciences, Beijing University of Posts and Telecommunications, Tongji University, the National Grand Theater, China Symphony Orchestra, the China Academy of Building Research
Physics, Beijing Institute of Architectural Design, China Audio Industry Association Expert Group, Communication University of China Institute of Acoustics spread, Guangzhou University
Audio-visual and lighting Institute of Technology, Guangzhou DSPPA Sound Technology Limited.
The main drafters of this standard. Cui Guang Xu literature, Liu Fang, Chen Jianhua, Chen Huaimin, Luo Xuecong, Sui Chunli, Qi Qi, Li Qi, Wang whole,
Shen Hao, Ma, Challenger, good tube group, Wang Jiqing, Luhong Yao, Shihui Bin, Lijin Kui, Wang Zheng, Chen Jing, Miao Yan Peng.
This standard was first published in 1985, in 1995 the first amendment.
Hall Reinforcement Characteristic Measurement
1 Scope
This standard specifies the method for measuring the acoustic properties of the hall is equipped with a PA system.
This standard applies to all types of halls equipped with PA system (such as theaters, multi-purpose hall, conference hall, gymnasium and other similar places) of
Acoustic characteristics measurement. Measuring acoustic characteristics may also refer to the stadium.
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 3241-2010 electro-acoustics octave and fractional octave filters
GB/T 3785 (all parts), electric acoustic sound level meter
GB/T 6278 analog program signal (GB/T 6278-1986, eqv IEC 60268-1c. 1982)
GB/T 9401-1988 Methods of measurement microphones (eqv IEC 60268-4. 1972)
GB/T 15508-1995 Acoustics speech intelligibility test method
GB J76 hall reverberation time measurement specification
SJ/T 10724-1996 General technical test condenser microphone
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
PA system soundreinforcementsystem
PA system including system devices sound field environment. Main process. the sound source signals into electrical signals, amplified, processed, transmitted
Lose, and then restore the sound field environment and services; main components. a microphone, a sound source equipment, mixers, signal processors, audio power
Amplifiers and speaker systems.
3.2
Acoustic feedback acousticalfeedback
Part of the sound reinforcement system in the speaker system can be released back to the microphone effect.
3.3
Maximum available gain maximumavailablegain
PA system produces acoustic feedback gain critical state in the hall belongs to minus 6dB.
3.4
Audio gain transmissiongain
PA system at the highest available gain when each measurement point in the hall and the sound system mean steady-state sound pressure level at the microphone steady sound pressure level
The difference.
Note. in decibels (dB).
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