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JJF 1520-2015: Calibration Specification for Head and Torso Simulator. Used in Acoustical Measurement
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JJF 1520-2015: Calibration Specification for Head and Torso Simulator. Used in Acoustical Measurement

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Calibration Specification for Head and Torso Simulator.Used in Acoustical Measurement People's Republic of China National Metrology Technical Specifications Head and Torso Simulator with acoustic calibration specification Issued on. 2015-04-10 2015-07-10 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Head and Torso Simulator with acoustic calibration specification Focal point. the National Committee of the acoustic measurement technology Drafting units. China Institute of Metrology Wuxi Jixing Automotive Parts Acoustic Technology Co., Ltd. Telecommunications Research Institute of the Ministry of Industry and Information Technology Beijing Products Quality Supervision and Inspection Institute This specification metering commissioned National Technical Committee is responsible for interpreting acoustics Drafters of this specification. Niu Feng (China Institute of Metrology) Huang Wei (Wuxi Jixing Automotive Parts Acoustic Technology Co., Ltd.) Zhong Bo (China Institute of Metrology) Zhang Xiaoxiao (Beijing Products Quality Supervision and Inspection Institute) Easy Kaohsiung (Ministry of Information Industry and Telecommunications Research Institute) Xu Huan (China Institute of Metrology) Pang Yao (Beijing Products Quality Supervision and Inspection Institute)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2. References (1) 3 terminology and units of measurement (1) 3.1 and torso simulator (1) 3.2 mouth reference point (1) 3.3 Reference point and torso simulator (1) 4 Overview (2) 5 Metrological characteristics (2) 5.1 ear sensitivity level (2) 5.2 ear free field frequency response (2) Ear directivity 5.3 (3) 5.4 mouth reference point of the amplitude-frequency characteristics (3) 5.5 mouth reference point of distortion (3) 5.6 mouth free-field amplitude-frequency characteristics (3) 6 calibration conditions (3) Environmental conditions 6.1 (3) 6.2 Standard device and ancillary equipment (3) 7 calibration items and calibration methods (3) 7.1 calibration items (3) 7.2 Calibration method (4) 8 calibration results expression (5) 8.1 Calibration Data Processing (5) 8.2 calibration certificate (5) 8.3 Calibration of Uncertainty Evaluation (5) 9 Recalibration interval (6) Appendix A calibration certificate contents (7) Appendix B Uncertainty evaluation calibration results of examples (12)

Introduction

This specification according to the rules JJF 1002-2010 "national verification procedures to write rules" given the preparation, and "Evaluation and Expression of Uncertainty in Measurement" in accordance with the requirements of JJF 1059.1-2012 assessment and expressed measurement uncertainty. This specification with reference to the ITU-T P.58-2013 communication Head and Torso Simulator (Headandtorso simulatorfortelephonometry) part of the performance parameters and test method acoustic signal. This specification is the first release. Head and Torso Simulator with acoustic calibration specification

1 Scope

This standard applies to the acoustic head and torso simulator acoustic parameters of calibration. 2. References This specification references the following documents. JJF 1001 common measurement terms and definitions JJF 1034 acoustic measurement terminology and definitions JJF 1147-2006 anechoic and semi-anechoic chamber acoustic characteristics calibration specification GB 3102.7-1993 Quantities and units of acoustics GB/T 3947-1996 Acoustics Terminology GB/T 20441.4-2006 Measurement microphones - Part 4. Specifications for working standard microphones IEC 60318-7.2011 electric acoustic head and ear simulator - Part 7 hearing measuring head and hindquarters Dry simulator (Electroacoustics-Simulatorsofhumanheadandear-Part 7. Headandtorso simulatorforthemeasurementofhearingaids) ITU-TP.58-2013 communication Head and Torso Simulator (Headandtorsosimulatorfortele- phonometry) For dated references, only the dated edition applies to this specification; undated reference documents Member, the latest edition (including any amendments) applies to this specification.

3 terminology and units of measurement

This specification uses quantities and units specified in GB 3102.7-1993. GB/T 3947-1996 and JJF 1001 and as defined in the following terms and definitions apply to this specification. 3.1 and torso simulator headandtorsosimulator, HATS Used to simulate the human voice collecting and scattering on the simulator, some also have an analog sound field radiated mouth Features. [ITU-TP.58-2013, the definition 3.16] 3.2 mouth reference point mouthreferencepoint, MRP Located in the middle of the mouth at a point in front of 25mm. [ITU-TP.58-2013, the definition 3.21] 3.3 and torso simulator reference point HATSreferencepoint, HRP HATS ear about the midpoint of the line connecting the centers. [ITU-TP.58-2013, the definition 3.15] ...