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GB/T 33769-2017 English PDF

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GB/T 33769-2017: Sound system equipment -- Electro-acoustical transducers -- Measurement of large signal parameters
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Basic data

Standard ID GB/T 33769-2017 (GB/T33769-2017)
Description (Translated English) Sound system equipment -- Electro-acoustical transducers -- Measurement of large signal parameters
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard M70
Classification of International Standard 33.160.50
Word Count Estimation 21,298
Date of Issue 2017-05-31
Date of Implementation 2017-12-01
Quoted Standard GB/T 12060.5-2011; IEC 60268-1
Adopted Standard IEC 62458-2010, IDT
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 basic terms and parameters of the large signal lumped parameter model of the electroacoustic transducer, the measurement method and the report form of the measurement result. This standard applies to transducers such as loudspeaker units, loudspeaker systems, headphones, miniature loudspeakers, vibrators and other actuators that use an electric or electromagnetic actuator to be coupled with a mechanical suspension system.

GB/T 33769-2017: Sound system equipment -- Electro-acoustical transducers -- Measurement of large signal parameters


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Sound system equipment - Electroacoustical transducers - Measurement of large signal parameters ICS 33.160.50 M70 National Standards of People's Republic of China Sound system equipment Measurement of Large Signal Parameters of Electroacoustic Transducer (IEC 62458..2010, IDT) 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 and definitions 1 4 measurement signal 3 4.1 Overview 3 4.2 Large DC signal 4 4.3 large DC signal and small AC signal 4 4.4 Broadband noise signal 4 4.5 music signal 4 5 installation conditions 4 5.1 Speaker unit 4 5.2 Speaker system 4 6 Climatic conditions 4 7 Acoustic environment 5 Pretreatment 5 9 Time varying characteristics of the loudspeaker 5 Measuring method 5 10.1 Overview 5 10.2 Static measurement method or quasi-static measurement method 5 10.3 point by point dynamic measurement method 6 Full dynamic measurement method 11 nonlinear electromechanical coupling factor 11.1 Force Coupling Factor Curve Bl (x) 9 11.2 Force Coupling Factor Defined Displacement xBl 9 11.3 Symmetry point xsym (xac) 11 11.4 voice coil offset xoffset 12 12 nonlinear stiffness factor 12 12.1 Nonlinear stiffness coefficient curve Kms (x) 12 12.2 Steady displacement xC 13 12.3 The degree of asymmetry of the stiffness coefficient AK (xpeak) 13 13 displacement related inductance Le (x) 14 13.1 Inductance curve Le (x) 14 13.2 Inductive limited displacement xL 15 14 Current-dependent inductance Le (i) 15 14.1 Definitions 15 Method of measurement 15 Parameters derived from geometry and performance 16 15.1 Maximum peak displacement xMAXd 16 15.2 Measuring method 16 Reference 17 Figure 1 Equivalent circuit of electric-force analog for electric transducer Figure 2 static measurement method and quasi-static measurement method of the device 6 Figure 3 Device for point-by-point dynamic measurement of large signal parameters Figure 4 large signal parameters of the whole dynamic measurement method of the device 8 Figure 5 Displacement xBl 10 defined by the electromechanical coupling factor Figure 6 reads the voice coil offset from the symmetric point xsym (xac) curve Figure 7 Non-linear force coupling factor Bl (x) curve defined in the symmetry point xsym 12 Figure 8 shows the stiffness coefficient asymmetry given by the Kms (x) curve

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard uses the translation method equivalent to IEC 62458..2010 "sound system equipment electroacoustic transducer large signal parameter measurement". This standard has made the following editorial changes. Figure 2, Figure 3, Figure 4 adds "Note. The sensor includes a mechanical sensor or an acoustic sensor". 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). This standard drafting unit. Nanjing University Institute of Acoustics, Guangzhou Guoguang Electric Co., Ltd., Suzhou Shangsheng Electronics Co., Ltd., Zhejiang Tin Lok Group Limited. The main drafters of this standard. Shen Yong, Xia Jie, Xie Shouhua, Chai Guoqiang, Liu Yin. Sound system equipment Measurement of Large Signal Parameters of Electroacoustic Transducer

1 Scope

This standard specifies the basic terms and parameters of the large signal lumped parameter model of electroacoustic transducers, the measurement method and the report of the measurement results form. This standard applies to transducers such as loudspeaker units, loudspeaker systems, headphones, microphones, vibrators and other A dynamic or electromagnetic actuator is coupled to a mechanical suspension system.

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. GB/T 12060.5-2011 Acoustic system equipment - Part 5. Test methods for main performance of loudspeakers (IEC 60268-5..2007, IDT) IEC 60268-1 Sound System Equipment Part 1. Overview (Soundsystemequipment-Part 1. General)

3 terms and definitions

The following terms and definitions apply to this document. 3.1 Electro-mechanicalequivalentcircuit The analogy between electricity and force is expressed by the circuit in order to apply the circuit theory to solve the problem of vibration and sound. Figure 1 shows the electric The equivalent circuit diagram of the electro - hydraulic analogue of the transducer.

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