GB/T 4959-2011 English PDFUS$689.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 4959-2011: Methods of measurement for the characteristics of sound reinforcement in auditoria Status: Valid GB/T 4959: Historical versions
Basic dataStandard 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33.160.99 Word Count Estimation: 30,384 Date of Issue: 2011-10-31 Date of Implementation: 2012-02-01 Older Standard (superseded by this standard): GB/T 4959-1995 Quoted Standard: GB/T 3421-2010; GB/T 3785.1; GB/T 3785.2; GB/T 6278; GB/T 9401-1988; GB/T 15508-1995; GBJ 76; SJ/T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 Regulation (derived from): Announcement of Newly Approved National Standards No. 15 of 2011 Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic 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---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. 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 ContentsPreface 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 26ForewordThis 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 Measurement1 ScopeThis 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 referencesThe 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 microphone3 Terms and DefinitionsThe 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). ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 4959-2011_English be delivered?Answer: Upon your order, we will start to translate GB/T 4959-2011_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 4959-2011_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 4959-2011_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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