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GB/T 33856-2017 English PDF

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GB/T 33856-2017: Methods of measurement for main characteristics of equipment of sound systems for emergency purposes
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Basic data

Standard ID GB/T 33856-2017 (GB/T33856-2017)
Description (Translated English) Methods of measurement for main characteristics of equipment of sound systems for emergency purposes
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard M70
Classification of International Standard 33.160.01
Word Count Estimation 23,260
Date of Issue 2017-05-31
Date of Implementation 2017-12-01
Older Standard (superseded by this standard) GB/T 16851-1997
Quoted Standard GB/T 2421.1-2008; GB/T 3241-2010; GB/T 3785.1-2010; GB/T 6278--2012; GB/T 12060.4-2012; ISO 7240-4-2003; IEC 60268-1-1985
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 testing methods for the main performance of emergency sound system equipment that can be broadcast in the protected area in emergency situations, including testing of emergency loudspeakers, testing of control and indicating equipment. This standard applies to general sound reinforcement and distribution systems. This standard also applies to similar control and indicating devices used in broadcast systems where the warning signal does not include voice information. This standard does not apply to systems with only a sounder or an electric bell.

GB/T 33856-2017: Methods of measurement for main characteristics of equipment of sound systems for emergency purposes


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Methods of measurement for main characteristics of equipments of sound systems for emergency purposes ICS 33.160.01 M70 National Standards of People's Republic of China Part of the replacement GB/T 16851-1997 The main performance test method of emergency sound system equipment 2017-05-31 released 2017-12-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released Directory Preface III 1 Scope 1 2 normative reference document 1 3 terms, definitions and abbreviations 1 4 emergency speaker test 2 5 Test of the control and pointing device (cie) 6 Appendix A (informative) Speaker Physical Reference 10 Appendix B (normative appendix) Speaker Acoustic performance measurement 12 Appendix C (Normative Appendix) Speaker Rated Noise Power Measurement (Durable) 15 Reference 20

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This part of the standard instead of GB/T 16851-1997 "emergency sound system", compared with GB/T 16851-1997 main technical changes as follows. --- adjust the scope of application; --- modified terms and definitions; --- Added test methods for emergency loudspeakers (see Chapter 4); - Added control of the control and pointing device (cie) (see Chapter 5). This standard is proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This standard is nationalized by the National Audio, Video and Multimedia Systems and Equipment Standardization Technical Committee (SAC/TC242). The drafting of this standard. Institute of Acoustics, Nanjing University, China Electronic Technology Standardization Research Institute, Shenzhen Fen Da Technology Co., Ltd. the company. The main drafters of this standard. Shen Yong, Liu Ziyun, Xia Jie, Dong Guiguan, Liu Jiong. This standard replaced the previous version of the standard release. --- GB/T 16851-1997. The main performance test method of emergency sound system equipment

1 Scope

This standard specifies the test method for the main performance of the emergency sound system equipment which can be broadcast in the protected area in an emergency situation, Including testing of emergency loudspeakers, testing of control and indicating equipment. This standard applies to general sound reinforcement and distribution systems. This standard also applies to similar control and indicating devices used in broadcast systems where the warning signal does not include voice information. This standard does not apply to systems with only a sounder or an electric bell.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. Environmental and environmental testing of electrical and electronic products - Overview and guidance GB/T 2421.1-2008 Electro - acoustic octave and fractional octave - frequency filters GB/T Electromagnetic sound level gauges - Part 1. Specifications GB/T 6278-2012 Sound System Equipment Overview Analog program signals GB/T 12060.4-2012 audio system equipment - Part 4. Methods of measurement of microphones ISO 7240-4..2003 Fire detection and alarm systems - Part 4. Power supply equipment (Firedetectionandalarm systems-Part 4. Powersupplyequipment) IEC 60268-1. 1985 Sound System Equipment Part 1. General (Soundsystemequipment-Part 1. General) 3 terms, definitions and abbreviations 3.1 Terms and definitions The following terms and definitions apply to this document. 3.1.1 Emergency sound system soundsystemsforemergencypurposes In case of emergency, in order to protect life, broadcast information is provided in one or more indoor or outdoor areas for rapid and orderly evacuation of hazardous areas Within the staff of the emergency system. Including the use of loudspeakers to broadcast emergency voice, alarm signals and so on. In non-emergency situations, the system can be used as a system General broadcast system. 3.1.2 Emergency Speaker Zone zoneofemergencyloudspeaker An area consisting of one or more acoustic partitions. In an emergency situation, it can be defined independently to distinguish it from other areas and can Exclusive broadcast information for that area. Note. When used as a non-emergency use, the speaker area division can be different from the area of the emergency. 3.1.3 Emergency loudspeaker emergencyloudspeaker When an emergency occurs, the emergency sound system is used to broadcast loudspeakers for emergency voice and alarm signals.

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