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JJF 1580-2016: Calibration Specification for Artificial Mouths
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JJF 1580-2016: Calibration Specification for Artificial Mouths

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Calibration Specification for Artificial Mouths National Metrological Technical Code of the People's Republic of China Simulation mouth calibration specification 2016-11-25 release 2017-02-25 Implementation State Administration of Quality Supervision, Inspection and Quarantine issued Simulation mouth calibration specification CalibrationSp Coordinate unit. National Acoustics Metrology Technical Committee The main drafting unit. Shenzhen Institute of measurement quality inspection Hengyang Hengyi Electric Co., Ltd. Hangzhou Aihua Instrument Co., Ltd. Participated in the drafting unit. China Institute of Metrology Shanghai Si Baiji Instrument System Co., Ltd This specification entrusts the National Acoustics Metrology Technical Committee to explain The main drafters of this specification. Zhang Guoqing (Shenzhen Institute of Measurement and Quality Inspection) Liu Xiangheng (Hengyang Hengyi Electric Co., Ltd.) Zhang Ning (Hangzhou Aihua Instrument Co., Ltd.) Participate in the drafters. Niu Feng (China Institute of Metrology) Dai Bin (Shanghai Si Baiji Instrument System Co., Ltd.) Zhang Ruige (Shenzhen Institute of Measurement and Quality Inspection) Zou Shipeng (Shenzhen Institute of Measurement and Quality Inspection)

table of Contents

Introduction (Ⅲ) 1 Scope (1) 2 References (1) 3 terms and units of measurement (1) 3.1 lip ring (1) 3.2 lip plane (2) 3.3 Simulation mouth (2) 3.4 Reference axis (2) 3.5 mouth reference point (MRP) (2) 3.6 sound field sound pressure distribution (2) 3.7 reference sound barrier (2) 3.8 sound barrier diffraction (2) 3.9 Simulation Speech (2) 3.10 electric simulation of spoken language (2) 3.11 sound simulation spoken tone (2) 4 Overview (3) 5 Metrological characteristics (3) 5.1 Near-field sound pressure distribution on the reference axis (3) 5.2 Reference axis external field sound pressure distribution (4) 5.3 Far-range sound pressure distribution on the reference axis (4) 5.4 Sound barrier diffraction (5) 5.5 Maximum sound pressure level that can be issued Lp, MAX (5) 5.6 Total distortion of sound signal (5) 5.7 Sound signal amplitude linearity (5) 6 Calibration conditions (6) 6.1 Environmental conditions (6) 6.2 Measurement standards and other equipment (6) 7 Calibration items and calibration methods (7) 7.1 Calibration items (7) 7.2 Calibration method (8) 8 Calibration results (15) 8.1 Calibration data processing (15) 8.2 Calibration Certificate (15) 8.3 Uncertainty of measurement of calibration results (16) 9 re-school time interval (16) Appendix A Contents of the Calibration Certificate (17) Appendix B Examples of Evaluation of Uncertainty (24) Appendix C simulation mouth near-field and far-field sound pressure measurement point selection and positioning (28) Appendix D pseudo-random noise signal measurement of the total distortion of the simulated mouth (30)

Introduction

This specification is based on the requirements and format of JJF 1071-2010 "National Metrological Calibration Rules". Technical aspects mainly refer to the international recommendations of the International Telecommunication Union ITU-TP.51..1996 "Simulation of the mouth" (Arti- ficialMouth) and JJF 1339-2012 "electro-acoustic tester calibration specifications". The calibration items for this specification are based on ITU-TP.51..1996. The total distortion of the sound signal Refer to the technical requirements of JJF 1339-2012 in 5.10. Simulation port for electroacoustic and telephone electroacoustic testing Compressed frequency response characteristics of the calibration can refer to JJG869-2002 "telephone electro-acoustic tester." This specification is based on JJF 1059.1-2012 "Measurement Uncertainty Assessment and Representation" gives the near-field sound on the reference axis An example of the evaluation of the uncertainty of the measurement of the difference in sound pressure spectrum of pressure distribution. This specification is the first release. Simulation mouth calibration specification

1 Scope

This specification applies to the calibration of electro-acoustic characteristics of analog ports in accordance with ITU-TP.51..1996 "Simulation mouth" requirements. Other simulation mouth calibration can refer to this specification.

2 reference file

This specification refers to the following documents. JJG176-2005 sound calibrator JJG869-2002 telephone electroacoustic tester Standard Terminology and Definitions for JJF 1001-2011 Terminology and definitions of acoustical metrology nouns JJF 1034-2005 Standard Specification for Acoustic Characteristics of Anechoic and Semi - anechoic Rooms JJF 1147-2006 Code for calibration of audio power amplifiers JJF 1200-2008 JJF 1288-2011 multi - channel acoustic analyzer calibration specification Standard for Calibration of Electroacoustic Testers JJF 1339-2012 GB 3102.7 The amount and unit of acoustics Terminology of acoustics nouns GB/T 3947-1996 ITU-TO.131 Quantitative Damping Test Equipment Using Pseudo-Random Noise Test Signals (QuantizingDistor- tionMeasuringEquipmentUsingaPseudo-randomNoiseTestSignal) ITU-TP.50..1996 Simulation of spoken speech (ArtificialVoices) ITU-TP.51..1996 Simulation mouth (ArtificialMouth) For dated references, only the dated edition applies to this specification; references that are not dated , The latest version (including all modifications) applies to this specification.

3 terms and units of measurement

JJF 1001-2011, GB/T 3947-1996, JJF 1034-2005 and ITU-TP.51..1996 Definitions and the following terms and definitions apply to this specification. This specification uses the amount and unit specified in GB 3102.7. 3.1 lip ring lipring A solid ring that simulates the effect of the lips. Note. 1 made of non-magnetic material, diameter 25mm, thickness less than 2mm. 2 can be firmly mounted on the simulation mouth. 3 lip ring defines the mouth reference axis and mouth reference point. ...