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JJF 1581-2016: Calibration Specification for Hand-held Sound Field Hearing Screening Equipments
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Calibration Specification for Hand-held Sound Field Hearing Screening Equipments
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JJF 1581-2016
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Basic data | Standard ID | JJF 1581-2016 (JJF1581-2016) | | Description (Translated English) | Calibration Specification for Hand-held Sound Field Hearing Screening Equipments | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A59 | | Word Count Estimation | 25,285 | | Date of Issue | 2016-11-25 | | Date of Implementation | 2017-02-25 | | Regulation (derived from) | State Administration of Quality Supervision, Inspection and Quarantine Notice No.116 of 2016 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine | JJF 1581-2016: Calibration Specification for Hand-held Sound Field Hearing Screening Equipments---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.
Calibration Specification for Hand-held Sound Field Hearing Screening Equipments
National Metrological Technical Code of the People's Republic of China
Standard for Calibration of Handheld Sound Field Hearing Screening
2016-11-25 release
2017-02-25 Implementation
State Administration of Quality Supervision, Inspection and Quarantine issued
Handheld sound field type hearing
Screening instrument calibration specification
ScreeningEquip
ments
Coordinate unit. National Acoustics Metrology Technical Committee
The main drafting unit. Shanghai Institute of Metrology and Testing Technology
China Institute of Metrology
Participated in the drafting unit. Guangzhou Institute of Metrology and Testing Technology
Fujian Institute of Metrology
This specification entrusts the National Acoustics Metrology Technical Committee to explain
The main drafters of this specification.
Deng Zheng (Shanghai Institute of Metrology and Testing Technology)
Zhou Ziwei (Shanghai Institute of Metrology and Testing Technology)
Zhong Bo (China Institute of Metrology)
Participate in the drafters.
Zhou Changhua (Guangzhou Institute of Metrology and Testing Technology)
An Zhaoliang (Shanghai Institute of Metrology and Testing Technology)
Li Qun (Fujian Institute of Metrology)
table of Contents
Introduction (II)
1 Scope (1)
2 References (1)
3 terms and units of measurement (1)
3.1 Warp spectrum characteristics (1)
3.2 Warrior distortion characteristics (1)
3.3 Filter Polyphony (1)
4 Overview (2)
5 Metrological characteristics (2)
5.1 Warble free field audition of the baseline hearing threshold sound pressure level error (2)
5.2 Warp spectrum characteristics (2)
5.3 warhead sound pressure level controller error (2)
5.4 Warble distortion characteristics (2)
5.5 Baseline auditory threshold sound pressure level error for narrowband noise diffusion field audition (2)
5.6 Narrowband noise level controller error (2)
5.7 Wideband noise level error (2)
5.8 Filter sound pressure level error (2)
5.9 filter sound pressure level controller error (2)
6 Calibration conditions (2)
6.1 Environmental conditions (2)
6.2 Measurement standards and other equipment (3)
7 Calibration items and calibration methods (3)
7.1 Calibration items (3)
7.2 Calibration method (3)
8 Calibration results (8)
8.1 Calibration data processing (8)
8.2 Calibration Certificate (9)
8.3 Uncertainty of measurement of calibration results (9)
9 re-school time interval (9)
Appendix A Free-field and diffuse field audiometry Listening threshold Sound pressure level (10)
Appendix B Calculation method of background noise correction value (13)
Appendix C Screen Format of Calibration Instrument (14)
Appendix D Examples of Measurement Uncertainty Evaluation (16)
Introduction
This specification is based on JJF 1071-2010 "national measurement calibration standard preparation rules" preparation.
This specification is based on the use of hand-held sound field type hearing screening device, and also refer to GB/T 4854.7-
2008 "Baseline zero level of acoustics calibration audiometric equipment Part 7. Benchmark threshold for free field and diffuse field audiometry"
GB/T 7341.2-1998 "Hearing meter Part 2. Language audiometry equipment" and GB/T 16296.2-2016
"Acoustics audition method Part 2. Sound field measurement with pure tone and narrowband test signal".
Evaluation and representation of the uncertainty of this specification Based on JJF 1059.1-2012 "Measurement uncertainty assessment and table
Show ".
This specification is the first release.
Standard for Calibration of Handheld Sound Field Hearing Screening
1 Scope
This specification is applicable to the calibration of a hand-held sound field type hearing screening apparatus.
2 reference file
This specification refers to the following documents.
JJG176-2005 sound calibrator
JJG449-2014 octave and fractional octave filters
Standard Terminology and Definitions for JJF 1001
Terminology and definition of acoustical metrological terms JJF 1034
GB 3102.7 The amount and unit of acoustics
Terminology of acoustics nouns GB/T 3947-1996
GB/T 4854.7-2008 Reference zero level for acoustic calibration audiometric equipment - Part 7. Free field and diffusion
Baseline hearing threshold for field audiometry
Electromagnetism audiometry equipment - Part 1. Pure tone audiometer GB/T 7341.1-2010
Listening apparatus - Part 2. Language audiometry equipment GB/T 7341.2-1998
GB/T 16296.2-2016 Acoustics - Methods of audiometry - Part 2. Sound signals in pure and narrowband test signals
Field audiometry
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
This specification uses the amount and unit specified in GB 3102.7.
JJF 1001, JJF 1034, GB/T 3947-1996, GB/T 4854.7-2008, GB/T 7341.1-
2010, GB/T 7341.2-1998 and GB/T 16296.2-2016 and the following terms and definitions apply to this
specification.
3.1 Warp spectrum characteristic value characteristicvalueofwarbletonespectrum
The difference between the sound pressure level of the 1/3 octave sound zone and the maximum of the other 1/3 octave sound pressure levels.
3.2 Warble distortion characteristic value characteristicvalueofwarbletonedistortion
Warp sound measurement corresponding to the center frequency of the filter where the 1/3 times the band voltage (square root value) square sum of arithmetic
Square root value and 100Hz ~ 20kHz frequency range of the total voltage (root mean root value) ratio, expressed as a percentage.
3.3 filtered polyphony filteredcomplextone
The polyphony of the specific frequency band retained by the filtering process.
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