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JJG 991-2017: Audiometric Equipment--Instruments for the Measurement of Aural Acoustic Impedance/Admittance
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
JJG 991-2017	English	579	Add to Cart	5 days [Need to translate]	Audiometric Equipment--Instruments for the Measurement of Aural Acoustic Impedance/Admittance
JJG 991-2004	English	959	Add to Cart	5 days [Need to translate]	Verification Regulation of Aural Impedance Audiometers

JJG 991-2017: Audiometric Equipment--Instruments for the Measurement of Aural Acoustic Impedance/Admittance

---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.
(Audiometry equipment otoacoustic impedance/admittance measuring instruments verification procedures) National metrological verification regulations of the People's Republic of China Audiometry Equipment Otoacoustic Impedance/Admittance Measuring Instruments Published on.2017-11-20 2018-05-20 Implementation The State Administration of Quality Supervision, Inspection and Quarantine issued Audiometry Equipment Otoacoustic Impedance/Admittance Measuring instrument calibration procedure Replacing JJG 991-2004 Integral Unit. National Acoustic Measurement Technical Committee Drafted by. China Academy of Metrology The People's Liberation Army Medical Acoustic Metrology Test Research Station Participated in drafting. Shanghai Institute of Metrology and Measurement Technology Henan Institute of Metrology Yunnan Institute of Measurement and Testing Technology Tianjin Institute of Metrology Supervision and Inspection This procedure entrusts the National Acoustic Measurement Technical Committee to explain The main drafters of this regulation. Zhong Bo (China Institute of Metrology) Yu Liming (People's Liberation Army Medical Acoustic Metrology Test Research Station) Participating drafters. Zhou Ziwei (Shanghai Measurement and Measurement Technology Research Institute) Wei Ping (Henan Provincial Institute of Metrology) Dai Rong (Yunnan Province Measurement and Measurement Technology Research Institute) Yan Yajun (Tianjin Metrological Supervision and Detection Research Institute) Xu Huan (China Institute of Metrology)

table of Contents

Introduction (III) 1 Scope (1) 2 References (1) 3 Terms and units of measure (2) 3.1 Acoustic impedance (2) 3.2 Acoustic admittance (2) 3.3 equivalent volume (2) 3.4 Relative pressure in the external auditory canal (2) 3.5 Probes (2) 3.6 Earplugs (2) 3.7 Probe Signal (3) 3.8 Probe Ears (3) 3.9 Measurement Plane (3) 3.10 Tympanometry (3) 3.11 Measuring tympanometry (3) 3.12 ear canal-compensated tympanometry (3) 3.13 Tympanogram (3) 3.14 Acoustic Reflection (3) 3.15 Ipsilateral reflection (3) 3.16 Contralateral Sound Reflection (3) 4 Overview (3) 5 Metrological performance requirements (4) 5.1 Human Otoacoustic Impedance/Admittance Measurement System (4) 5.2 Pressure System (4) 5.3 Acoustic Reflection Stimulation System (5) 6 General technical requirements (6) 6.1 Appearance (6) 6.2 Signs (6) 6.3 Operating instructions (6) 7 Measuring Instruments Control (7) 7.1 Verification conditions (7) 7.2 Verification Projects (7) 7.3 Verification Methods (8) 7.4 Processing of verification results (12) 7.5 Certification Period (12) Appendix A Insertion Headphones Pure-tone Reference Equivalent Sensing Sound Pressure Level (13) Appendix B Loudspeaker Standard Reference Echo Threshold Sound Pressure Level (14) Appendix C Internal Page Format of Notification of Verification Certificate and Verification Results (16)

Introduction

This code is based on the requirements and format of the JJF1002-2010 “Rules for the preparation of national metrological verification regulations”. According to JJF1059.1-2012 "Evaluation and Expression of Uncertainty in Measurement" to assess the uncertainty of the measurement results. This procedure mainly refers to IEC 60645-5.2004 "Electroacoustic audiometry equipment - Part 5. Otoacoustic impedance/conductivity Nanometric Instruments (Electroacoustics-Audiometricequipment-Part 5. Instrumentsforthe Measurementofauralacousticimpedance/admittance) for JJG 991-2004 Impedance Hearing The "testing procedures" are revised. Compared with JJG 991-2004, the main technical changes except editorial modification are as follows. --- In keeping with IEC 60645-5.2004 and GB/T 15953-1995, change the name of this regulation It is the verification procedure for the “acoustic impedance/admittance measurement instrument for audiometry equipment”. --- According to IEC 60645-5.2004 and related standards, the related terms in the original regulations have been adjusted, such as Added tympanometry, tympanometry and other concepts. --- According to IEC 60645-5.2004 and related standards, the measurement performance requirements in the original regulations were revised Changed to meet the requirements of the new standard, and the technical requirements of the amendment mainly include. probe tone and acoustic reflection stimulation pure tone stimulation The maximum allowable error of the signal frequency and total harmonic distortion, pressure indication error and so on. --- In the "Accreditation Project", the first test, follow-up test and in-use check items are distinguished. ---In the "measurement standards and major ancillary equipment", the "measurement amplifier" and "bandpass filter" replacement Into an "acoustic analyzer"; distinguishes and describes four possible ear simulators and acoustic couplers; The requirements of IEC 60645-5.2004 increase the "standard volume chamber" equipment and its technical requirements. --- According to the requirements of JJF1002-2010 to re-revise the verification certificate/verification results notice page format. The issuance of previous versions of this procedure is. ---JJG 991-2004. Auditory Equipment Otoacoustic Impedance/Admittance Measuring Instrument Verification Procedures

1 Scope

This procedure is applicable to the first verification, subsequent verification and in-service inspection of otoacoustic impedance/admittance measurement instruments.

2 references

This procedure refers to the following documents. JJG 388-2012 Audiometric Instrument Pure Tone Audiometer JJF1001-2011 Universal Measurement Terms and Definitions JJF1034-2005 Acoustic Measurement Terms Terms and Definitions GB/T 3102.7 Acoustic quantities and units GB/T 3947 Acoustic Terms GB/T 4854.1-2004 Reference zero for acoustic calibration audiometry equipment. Part 1. Pure ear headphones Sound Reference Equivalent Threshold Sound Pressure Level GB/T 15953-1995 Otoacoustic Impedance/Admittance Measuring Instrument GB/T 16402-1996 Acoustic Insertion Headphones Pure Tone Reference Equivalent Threshold Sound Pressure Level GB/T 25498.3 Electroacoustic head simulator and ear simulator Part 3. Calibrated pressure ear Machine acoustic coupler IEC 60318-1 Electroacoustic head and ear simulators. Part 1. Calibration of earphones and earmuffs Electroacoustics-Simulatorsofhumanheadandear-Part 1.Earsimu- Latorforthemeasurementofsupra-auralandcircumauralearphones) IEC 60318-4 Electroacoustic head and ear simulators. Part 4. Earphone measurements using earplugs coupled to the human ear Quantity Accelerators-Simulatorsofhumanheadandear-Part 4.Occlu- Ded-earsimulatorforthemeasurementofearphonescoupledtoearbymeansofear Inserts) IEC 60318-5 Electroacoustic head and ear simulators. Part 5. Measurement of earbud hearing aids and earphones 2cm3 Coupler (Electroacoustics-Simulatorsofhumanheadandear-Part 5.2cm3 Couplerforthemeasurementofhearingaidsandearphonescoupledtheearbymeans Ofearinserts) IEC 60645-5.2004 Electroacoustic audiometry equipment - Part 5. Otoacoustic impedance/admittance measuring instruments (Electroacoustics-Audiometricequipment-Part 5. Instrumentsforthemeasurement Ofauralacousticimpedance/admittance) For dated references, only the dated version applies to this procedure; any undated references The latest version (including all amendments) is applicable to this procedure. ...