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JJF 1191-2008

JJF 1191-2008_English: PDF (JJF1191-2008)
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JJF 1191-2008English809 Add to Cart 4 days Calibration Specification for Acoustic Performance of Audiometry Rooms JJF 1191-2008 Obsolete JJF 1191-2008

BASIC DATA
Standard ID JJF 1191-2008 (JJF1191-2008)
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 23,281
Date of Issue 2008-03-24
Date of Implementation 2008-06-24
Quoted Standard JJG 176-2005; JJG 449-2001; JJF 1034-2005; JJF 1059-1999; GB/T 3102.7-1993; GB/T 16296-1996; GB/T 16403-1996; GB/T 20441.4-2006
Drafting Organization Shanghai Measurement and Testing Technology
Administrative Organization National Acoustic Measurement Technical Committee
Regulation (derived from) AQSIQ Announcement No. 35 of 2008
Issuing agency(ies) State Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to acoustic measurements with Audio Power Amplifier (hereinafter referred to as PA) calibration.

JJF 1191-2008
Calibration Specification for Acoustic Performance of Audiometry Rooms
People's Republic of China National Metrology Technical Specifications
Audiometry room acoustic characteristics calibration specification
Posted 2008-03-24
2008-06-24 implementation
The State Administration of Quality Supervision, Inspection and Quarantine released
Audiometry room acoustic characteristics calibration specification
Rooms
This specification by the State Administration of Quality Supervision, Inspection and Quarantine, 2008 March 24 ratification and
From June 24, 2008 into effect.
Focal point. the National Committee of the acoustic measurement technology
Drafting. Shanghai Institute of Measurement and Testing
China Institute of Metrology
This specification metering commissioned National Technical Committee is responsible for interpreting acoustics
The main drafters of this specification.
Gu Jianxiu (Shanghai Institute of Measurement and Testing)
Qiu Jianhua (China Institute of Metrology)
Drafters participate.
Hualin Hu (Shanghai Institute of Measurement and Testing)
Zhang Yi (Shanghai Institute of Measurement and Testing)
Chen Jianguo (Shanghai Institute of Measurement and Testing)
Karen Chen (Shanghai Institute of Measurement and Testing)
table of Contents
1 Scope (1)
2. Referenced Documents (1)
3 terminology and units of measurement (1)
4 Overview (1)
5 Metrological characteristics (2)
5.1 background noise sound pressure level (2)
5.2 sound field characteristic (5)
6 calibration conditions (6)
Environmental conditions 6.1 (6)
6.2 Standard device and other devices (6)
7 calibration items and calibration methods (7)
7.1 calibration items (7)
7.2 Calibration method (7)
8 calibration results expression (10)
8.1 Calibration data processing (10)
8.2 calibration certificate (10)
8.3 Evaluation of Uncertainty in Measurement Results (10)
9 Recalibration interval (10)
Appendix A recommended audiometric chamber calibration certificate (11)
Examples Appendix B Assessment of Uncertainty in Measurement (14)
Audiometry room acoustic characteristics calibration specification
1 Scope
This specification provides for sound field audiometry chamber acoustic characteristics measurement method.
This applies to the audiometry room air conduction headphones, speakers, or bone vibration as sound generating device, using pure tones, FM sound,
Narrowband noise or recorded language material as a signal audiometry hearing threshold examination.
The main purpose is to make the subject in the frequency range of 125Hz ~ 12.5kHz hearing the threshold determination, to ensure audiometry
The accuracy and reproducibility of results.
This specification is also suitable for measuring auditory evoked otoacoustic emissions and audiometry test chamber acoustic characteristics of potential.
2 Citations
This specification references the following documents
JJG176-2005 "sound calibrators"
JJG449-2001 "octave and 1/3 octave filters"
JJF 1034-2005 "Acoustic measurement terminology and definitions"
JJF 1059-1999 "Evaluation and Expression of Uncertainty in Measurement"
GB/T 3102.7-1993 "acoustic volume and unit"
GB/T 16296-1996 "Acoustics - Audiometric test methods - Part 2. measured with pure tone and narrow-band test signals sound field
Listen "(eqvISO 8253-2.1992)
GB/T 16403-1996 "method of pure tone audiometry Acoustics air conduction and bone conduction threshold audiometry basic" (eqvISO
8253-1.1992)
GB/T 20441.4-2006 "Measurement microphones - Part 4. Specifications for working standard microphones"
When using this specification it should be noted that using the currently valid version of the documents cited.
3 terminology and units of measurement
In addition to this specification uses the following terms and definitions, terms and definitions relating JJF 1034-2005 and GB/T
Quantities and Units 3102.7-1993 provisions applicable to the specification.
3.1 Reference point referencepoint
When the subject is located in the sound field of the test position, the midpoint of a line connect