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Calibration Specification for Acoustic Performance of Audiometry Rooms
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Basic data
| Standard ID | JJF 1191-2019 (JJF1191-2019) |
| Description (Translated English) | Calibration Specification for Acoustic Performance of Audiometry Rooms |
| Sector / Industry | Metrology & Measurement Industry Standard |
| Classification of Chinese Standard | A59 |
| Classification of International Standard | 17.140 |
| Word Count Estimation | 25,294 |
| Date of Issue | 2019 |
| Date of Implementation | 2020-03-27 |
| Issuing agency(ies) | State Administration for Market Regulation |
JJF 1191-2019: Calibration Specification for Acoustic Performance of Audiometry Rooms
---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 acoustic characteristics of audiometry rooms)
National Measurement Technical Specification of the People's Republic of China
Calibration specification for acoustic characteristics of audiometry rooms
2019-09-27 release
2020-03-27 Implementation
Issued by the State Administration of Market Supervision and Administration
Calibration specification for acoustic characteristics of audiometry rooms
Replace JJF 1191-2008
Centralized unit. National Acoustic Metrology Technical Committee
Main drafting unit. Shanghai Institute of Metrology and Testing Technology
Chinese Academy of Metrology
Participated in the drafting unit. Fujian Institute of Metrology
Guangzhou Institute of Metrology and Testing Technology
Jiangsu Academy of Metrology
This specification is entrusted to the National Acoustic Metrology Technical Committee for interpretation
The main drafters of this specification.
An Zhaoliang (Shanghai Institute of Metrology and Testing Technology)
Zhong Bo (Chinese Academy of Metrology)
Participating drafters.
Zhou Ziwei (Shanghai Institute of Metrology and Testing Technology)
Li Qun (Fujian Institute of Metrology)
Zhou Changhua (Guangzhou Institute of Metrology and Testing Technology)
Yun Wu (Jiangsu Institute of Metrology)
Deng Zheng (Shanghai Institute of Metrology and Testing Technology)
table of Contents
Introduction (Ⅱ)
1 Scope (1)
2 References (1)
3 Terms and units of measurement (1)
4 Overview (2)
5 Metrological characteristics (2)
5.1 Noise floor sound pressure level (2)
5.2 Sound field characteristics (6)
5.3 Airborne sound insulation characteristics (6)
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 Check before calibration (7)
7.3 Sound pressure level calibration method for noise floor (7)
7.4 Calibration method of sound field characteristics (8)
7.5 Calibration method of airborne sound insulation characteristics (10)
8 Expression of calibration results (11)
8.1 Calibration data processing (11)
8.2 Calibration certificate (11)
8.3 Uncertainty evaluation of calibration results (11)
9 Recalibration time interval (11)
Appendix A Contents of Calibration Certificate in Audiometry Room (12)
Appendix B Examples of uncertainty assessment of calibration results (17)
Introduction
This specification is written in accordance with the requirements and format of JJF 1071-2010 "Rules for Compiling National Measurement and Calibration Specifications".
In terms of technology, we mainly refer to GB/T 16296.2-2016 "Acoustic Audiometry Methods Part 2.Using Pure
Sound field audiometry of sound and narrowband test signals", ISO 8253-1.2010 "Acoustic Hearing Test Methods Part 1.
"Pure-tone air conduction and bone conduction audiometry" requirements and test methods for the performance parameters of "background noise sound pressure level" and "sound field characteristics"
Method, refer to GB/T 19885-2005 "Laboratory and on-site measurement of sound insulation performance of acoustic insulation rooms"
The test method for "airborne sound insulation characteristics" is specified.
This regulation replaces JJF 1191-2008 "Specification for Calibration of Acoustic Characteristics of Audiometry Room". Phase with JJF 1191-2008
The main technical changes are as follows.
--- Added the measurement content of air acoustic insulation characteristics.
The previous releases of this specification are.
---JJF 1191-2008.
Calibration specification for acoustic characteristics of audiometry rooms
1 Scope
This specification applies to the frequency range from 125Hz to 12.5kHz, using air-conducting headphones, speakers or bone vibrators as
Sound-generating device; use pure tones, FM tones, narrow-band noise, or recorded language materials as audiometry signals for hearing threshold checks
The determination and evaluation of the acoustic characteristics of the listening room. The airborne sound insulation measurement specified in this specification is applicable to the listening room and external air
Measurement of sound insulation performance.
This specification is also applicable to the measurement of acoustic characteristics of the audiometry room for measuring otoacoustic emissions and auditory evoked potentials.
2 Reference documents
This specification refers to the following documents.
JJG176-2005 Sound Calibrator
JJG449-2014 octave and fractional octave filters
JJF 1034-2005 Acoustic measurement terms and definitions
JJF 1059.1-2012 Evaluation and expression of measurement uncertainty
GB/T 3102.7-1993 Acoustic quantities and units
GB/T 16296.2-2016 Acoustic audiometry method Part 2.Sound using pure tone and narrow band test signal
Field audiometry
GB/T 19885-2005 Laboratory and field measurement of sound insulation performance of acoustic insulation room
GB/T 20441.4-2006 Measurement microphones Part 4.Specifications of working standard microphones
GB 50118-2010 Code for sound insulation design of civil buildings
GB/T 50121-2005 Evaluation standard for sound insulation of buildings
ISO 8253-1.2010 Acoustic Hearing Test Method Part 1.Pure Tone Air Conduction and Bone Conduction Audiometry
(Acoustics-Audiometrictestmethods-Part 1.Pure-toneairandboneconductionaudi-
ometry)
For dated reference documents, only the dated version applies to this specification; for those without date references
The latest version (including all amendments) is applicable to this specification.
3 Terms and units of measurement
This specification adopts the quantity and unit specified in GB/T 3102.7.
The terms and definitions defined in JJF 1034-2005 and the following apply to this specification.
3.1 reference point
When the subject is located in the test position of the sound field, the two ear canal openings of the subject are connected to the midpoint of the straight line.
3.2 reference axis
The axis perpendicular to the radiating surface of the speaker. For single radiators or horn speakers, the shaft passes through the diaphragm or horn
Geometric center.
...
