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GB/T 16296.1-2018 English PDF

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GB/T 16296.1-2018: Acoustics -- Audiometric test methods -- Part 1: Pure-tone air and bone conduction audiometry
Status: Valid

GB/T 16296.1: Historical versions

Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 16296.1-2018564 Add to Cart 5 days Acoustics -- Audiometric test methods -- Part 1: Pure-tone air and bone conduction audiometry Valid
GB/T 16296-1996599 Add to Cart 3 days Acoustics. Audiometric test methods. Part 2: Sound field audiometry with pure tone and narrow-band test signals Obsolete

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Basic data

Standard ID: GB/T 16296.1-2018 (GB/T16296.1-2018)
Description (Translated English): Acoustics -- Audiometric test methods -- Part 1: Pure-tone air and bone conduction audiometry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A59
Classification of International Standard: 17.140
Word Count Estimation: 30,347
Date of Issue: 2018-03-15
Date of Implementation: 2018-10-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 16296.1-2018: Acoustics -- Audiometric test methods -- Part 1: Pure-tone air and bone conduction audiometry


---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.
Acoustics--Audiometric test methods--Part 1. Pure-tone air and bone conduction audiometry ICS 17.140 A59 National Standards of People's Republic of China Replace GB/T 16403-1996 Acoustic audiometry Part 1. Pure tone air conduction and bone conduction test Part 1. Pure-toneairandboneconductionaudiometry (ISO 8253-1.2010, IDT) Published on.2018-03-15 2018-10-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Administration issued

Content

Foreword III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 General questions of the audiometry method 4 4.1 Overview 4 4.2 Calibration of the audiometry equipment benchmark zero level 4 4.3 Requirements for audiometry equipment 4 4.4 Qualified testers 4 4.5 Test time 4 4.6 Audiometry environment conditions 5 4.7 Measurement uncertainty 5 5 Preparation of the subject before the audiometry and guidance to the subject and wearing the transducer 5 5.1 Preparation of the subject 5 5.2 Guidance to the subject 5 5.3 Transducer wear 6 6 Fixed frequency audiometry to determine the air conduction threshold level 6 6.1 Overview 6 6.2 Manual method for measuring hearing threshold 6 6.3 Determination of the automatic recording of the auditory threshold of the audiometer 8 6.4 Determination of the hearing threshold of computer control method 9 7 Sweeping audiometry air conduction threshold level determination 9 7.1 Overview 9 7.2 Test tone transmission 9 7.3 Familiarity 9 7.4 Determination of hearing threshold level 9 7.5 Calculation of the threshold of the specified frequency 9 8 bone conduction threshold determination method 10 8.1 Method of listening and listening 10 8.2 Plugging ears 10 8.3 Airborne sound radiation from the bone vibrator 10 8.4 Vibration tactile sense 10 8.5 Test procedure for bone masking and masking 10 9 Screening and listening methods 11 9.1 Overview 11 9.2 Step 11 of the screening test 10 Audiogram 11 11 Allowable ambient noise 12 11.1 Audible threshold measurement allowed ambient noise 12 11.2 Psychoacoustic verification of environmental noise 12 12 Maintenance and calibration of audiometry equipment 15 12.1 Overview 15 12.2 Check interval 16 12.3 Class A---General Inspection and Subjective Verification 16 12.4 Class B---Periodic objective verification 17 12.5 Class C---Basic Calibration Test 17 Appendix A (informative) Measurement uncertainty 18 Reference 22

Foreword

GB/T 16296 "Acoustic Audiometry Method" includes the following three parts. --- Part 1. pure tone air conduction and bone conduction test; --- Part 2. Sound field audiometry with pure tone and narrowband test signals; --- Part 3. Speech audiometry. This part is the first part of GB/T 16296. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 16403-1996 "Acoustic audiometry method pure tone air conduction and bone conduction hearing threshold basic audiometry". Compared with GB/T 16403-1996, the main technical changes in this part are as follows. --- Removed the reference standards IEC 373.1971, ISO 389-4.1994, IEC 804.1985 (see.1996 edition); --- Added normative references GB/T 4854.5, GB/T 4854.8, ISO /IEC Guide 98-3 (see Chapter 2); --- Revised the terms and definitions 3.2, 3.3, 3.6, 3.8, 3.10, 3.12, 3.16, 3.21, 3.22 and 3.23 (see 3.2, 3.3, 3.6, 3.8, 3.10, 3.12, 3.16, 3.21, 3.22, 3.23,.1996 editions 3.2, 3.3, 3.6, 3.8, 3.10, 3.12, 3.16, 3.21, 3.22, 3.23); --- Increased measurement uncertainty (see 4.7 and Appendix A); --- Added the general provisions of 6.2.3, 6.2.4, 7.1 and 9.2 (see 6.2.3.1, 6.2.4.1, 6.3.1, 7.1, 9.2.1); --- Revised the relevant content of the audiogram (see Table 1, Table 1 of the.1996 edition); --- Increased requirements for instruments that measure ambient noise (see 11.1); --- Increased the acoustic attenuation values of the plug-in earphones and earmuff headphones in Table 3 (see Table 11.1). --- Change the Appendix A of the.1996 edition to a reference (see References, Appendix A of the.1996 edition). This section uses the translation method equivalent to ISO 8253-1.2010 "Acoustic audiometry methods Part 1. Pure tone air conduction and bone conduction test law". The documents of our country that have a consistent correspondence with the international documents referenced in this part are as follows. ---GB/T 3241-2010 Electroacoustic octave and fractional octave filter (IEC 61260.1995, MOD); --- GB/T 3785.1-2010 Electroacoustic sound level meters - Part 1. Specification (IEC 61672-1.2002, IDT); --- GB/T 4854.1-2004 Acoustic calibration of audio-visual equipment - Part 1 - Part 1 Effective threshold sound pressure level (ISO 389-1.1998, IDT); --- GB/T 4854.3-1998 Acoustical calibration of audio-visual equipment - Part 3 - Part 3 Force level (eqvISO 389-3.1994); --- GB/T 4854.5-2008 Acoustic calibration of audio-visual equipment benchmark zero-order part 5. 8kHz ~ 16kHz frequency range Peripheral pure tone reference equivalent threshold sound pressure level (ISO 389-5.2006, IDT); --- GB/T 4854.8-2007 Acoustic calibration of audio-visual equipment - Part 0 - Part 8 Effective threshold sound pressure level (ISO 389-8.2004, IDT); ---GB/T 16402-1996 Acoustic plug-in headphones pure tone reference equivalent threshold sound pressure level (eqvISO 389-2.1994). This part was proposed by the Chinese Academy of Sciences. This part is under the jurisdiction of the National Acoustic Standardization Technical Committee (SAC/TC17). This section was drafted. Institute of Otorhinolaryngology, General Hospital of Chinese PLA, Institute of Acoustics, Chinese Academy of Sciences, Qingdao Technological University, China Electronics The third institute of the Science and Technology Group Corporation. The main drafters of this section. Wu Wenming, Yu Fei, Yu Liming, Li Xiaodong, Sang Jinqiu, Liu Bilong, Cheng Xiaobin, Lu Yadong, Dai Genhua, Han Jie. The previous versions of the standards replaced by this section are. ---GB/T 16403-1996.

Introduction

This section specifies the basic methods and requirements for transmitting pure tone signals to the subject to measure the hearing threshold via headphones and bone vibrators, excluding electrophysiology. Test Methods. There are many factors involved in getting a reliable test for a hearing test. GB/T 7341.1-2010 specifies the requirements for audiometers. Correct The inspection, calibration and maintenance of the audiometry instrument in use is important. This section briefly describes the calibration issues. in order to avoid The ambient noise in the listening room masks the test signal, and the ambient noise level should not exceed a certain value, which is a method of transmitting a signal to the subject, ie Use different earphones or bone vibrators. This section gives the maximum ambient noise that should not be exceeded when the measured threshold level is as low as 0 dB. Allows sound pressure level. The highest ambient noise level allowed to measure other minimum listening thresholds is also given. This section specifies the use of pure tone air conduction And the method of determining the threshold of hearing by the bone conduction test. For screening and listening, only the air conduction audiometry is briefly described. Audiometry can be performed with the following equipment. a) manual audiometer; b) automatic recording of the audiometer; c) Computer controlled audiometry equipment. This section gives a method for measuring the hearing threshold for these three types of signal transmission methods. For screening and listening, only the manual or The computer controls the audiometry method of the audiometer. This method of audiometry is suitable for most adults and children. Other methods may also be used Equivalent to the results measured by the methods specified in this section. For young children, the elderly or those who are not physically fit, this section may be required The proposed method steps make some modifications, and this modification may result in inaccurate audiometry results. Acoustic audiometry Part 1. Pure tone air conduction and bone conduction test

1 Scope

This part of GB/T 16296 specifies methods, procedures and requirements for the determination of pure tone air conduction and bone conduction hearing threshold. For screening and listening, only Pure tone air conduction test method. This method may not be suitable for special people, such as young children. This section does not include methods for listening to the subject's listening level above the threshold level. This section does not specify speech measurement, electrophysiological audiometry, and audiometry methods and requirements using speakers as sound sources.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 7341.1-2010 Electroacoustic audiometry equipment - Part 1. Pure tone audiometer (IEC 60645-1.2001, IDT) ISO 389-1 - Acoustical calibration of audio-visual equipment - Part 1 . Part 1 (Acoustics-Referencezeroforthecalibrationofaudiometricequipment-Part 1. Referenceequivalent Thresholdsoundpressurelevelsforpuretonesandsupra-auralearphones) ISO 389-2 - Acoustical calibration of audio-visual equipment - Part 2. Part 2. Plug-in headphone, pure tone reference equivalent threshold sound pressure level (Acoustics-Referencezeroforthecalibration ofaudiometricequipment- Part 2.Reference Equivalentthresholdsoundpressurelevelsforpuretonesandinsertearphones) ISO 389-3.1994 Benchmark zero-order for acoustically calibrated audio-visual equipment - Part 3 (Acoustics-Referencezeroforthecalibrationofaudiometricequipment-Part 3. Referenceequivalent Thresholdforcelevelsforpuretonesandbonevibrators) ISO 389-5 - Acoustical calibration of audio-visual equipment - Part 5. Part 5. Plain tone equivalents in the frequency range from 8 kHz to 16 kHz Acoustics-Referencezeroforthecalibrationofaudiometricequipment-Part 5.Reference Equivalentthresholdsoundpressurelevelsforpuretonesinthefrequencyrange8kHzto16kHz) ISO 389-8 - Acoustical calibration of audio-visual equipment - Part 0. Part 8 (Acoustics-Referencezeroforthecalibrationofaudiometricequipment-Part 8. Referenceequivalent Thresholdsoundpressurelevelsforpuretonesandcircumauralearphones) ISO /IEC Guide 98-3 Measurement Uncertainty Part 3. Guide to Measurement Uncertainty [Uncertaintyofmeasure- ment-Part 3. Guidetotheexpressionofuncertaintyinmeasurement(GUM.1995)] IEC 61260 electroacoustic octave and fractional octave filter (Electroacoustics-Octave-bandand fractional- Octave-bandfilters) IEC 61672-1 Electroacoustic Sound Level Meter Part 1. Specification (Electroacoustics-Soundlevelmeters-Part 1. Specifications)

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Air conduction The process of sound passing through the outer and middle ears to the inner ear in the air. 3.2 Ear simulator earsimulator A device for measuring the sound output of a sound source, the sound pressure being measured by a calibrated microphone coupled to the sound source. The total acoustic impedance of the device The acoustic impedance of a normal human ear near a prescribed position and a prescribed frequency band. Note. The ear simulator is specified in IEC 60318-1 [4] and IEC 60318-4 [6]. 3.3 Acoustic coupler A device for measuring the sound output of a sound source, the sound pressure being measured by a calibrated microphone coupled to the sound source. The coupler is a shape and The volume of the predetermined cavity does not need to be close to the acoustic impedance of the normal human ear. Note. Acoustic couplers are specified in IEC 60318-3 [5] and IEC 60318-5 [7]. 3.4 Bone conduction The process of transmitting sound to the inner ear mainly by mechanical vibration of the skull. 3.5 Bone vibrator Bonevibrator An electromechanical transducer that causes hearing by vibrating the skull. 3.6 Force coupler mechanicalcoupler A device designed to apply a predetermined static force to a bone vibrator to present a predetermined force impedance. Force coupler equipped with an electromechanical exchange The energy device is used to measure the level of vibration force on the contact surface with the bone vibrator. Note. IEC 60318-6 [8] specifies the force coupler. 3.7 Otology normal person otologicalynormalperson People with normal health conditions, no symptoms of ear disease, no obstruction of the ear canal, no history of excessive noise exposure, no history of use of ototoxic drugs or Familial hearing loss. 3.8 Hearing threshold hearingthreshold Under the specified conditions, the subject makes a correct perceived response in the repeated test to achieve a predetermined percentage of the lowest sound pressure level or vibration Force level. Note. The predetermined percentage is often taken as 50%. 3.9 Equivalent threshold sound pressure level equivalentthresholdsoundpressurelevel Wearing a specified type of earphone on a given test ear with a prescribed force, measuring the hearing threshold at a prescribed frequency to obtain a voltage excitation at the hearing threshold The earphone is such that it produces a sound pressure level in a specified acoustic coupler or ear simulator. 3.10 Reference equivalent threshold sound pressure level referenceequivalentthresholdsoundpressurelevel;RETSPL For the specified frequency, with the specified type of earphones, in the specified acoustic coupler or ear simulator, the number of men and women measured is large enough The median of the equivalent threshold sound pressure level of the ear of a normal ear, 18 to 25 years old. Note. The age range referred to in ISO 389-1 is 18 to 30 years old and is specified as the value of (equivalent threshold sound pressure level). 3.11 Equivalent threshold vibration force level equivalentthresholdvibratoryforcelevel Wear the specified type of bone vibrator on the mastoid or forehead of the person with a prescribed force, and measure the hearing threshold of the given frequency of the given ear to obtain the hearing threshold. The voltage at the time excites the bone vibrator to produce a level of vibrational force on the specified force coupler. 3.12 Reference equivalent threshold vibration level referenceequivalentthresholdvibratoryforcelevel; RETFL For the specified frequency, with the specified type of bone vibrator, the number of male and female, ages measured on the specified force coupler is The median equivalent of the threshold force level of the ear of a normal 18- to 25-year-old ear. Note. The age range referred to in ISO 389-3 is 18 to 30 years old and is specified as the arithmetic mean of the equivalent threshold. 3.13 Pure tone hearing level hearinglevelofapuretone; HLofapuretone At a specified frequency, a specified type of transducer is used, in a prescribed manner, by the transducer in a specified ear simulator or force coupling The sound pressure level or vibration force level generated in the device is subtracted from the corresponding reference equivalent threshold sound pressure level or the reference equivalent threshold vibration level. 3.14 Listening threshold for a given ear hearingthresholdlevelofagivenear At a specified frequency, for a given type of earphone, the hearing threshold for that frequency is expressed in terms of hearing level. 3.15 Occlusion effect When the earphone is placed on the ear or the earplug is placed in the external auditory canal, a closed air cavity is formed in the external auditory canal, which will result in the arrival. The phenomenon that the bone's bone signal level changes (generally rising). Note. The plugging effect is greatest at low frequencies. 3.16 Masking masking The phenomenon that the hearing threshold of a given ear for a particular sound rises due to the presence of another masking sound. 3.17 Effective masking level of band noise effectivemaskinglevelofanoiseband Due to the presence of masked band noise, the hearing threshold of the pure tone corresponding to the geometric center frequency of the band is increased, at this time the pure tone The hearing level is the effective masking level of the band noise. Note. 8.5.2a) of GB/T 7341.1-2010 specifies that the narrowband noise masking stage is calibrated with an effective masking level. 3.18 Vibrating tactile threshold vibrotactilethresholdlevel In a repeated test, someone can make a vibration force level or sound pressure level that is 50% correct in response to the vibration of the skin. 3.19 Pure tone audiometer puretoneaudiometer An electroacoustic instrument equipped with headphones and a pure tone that provides a known sound pressure level at a specified frequency. Note. It can also be equipped with a bone vibrator and/or with a masking function. 3.20 Manual audiometer manualaudiometer Signal transmission, frequency and hearing level selection, and result recording are all manually controlled audiometers. 3.21 Automatic recording audiometer automatic-recordingaudiometer An audiometer that automatically completes the transmission of signals, changes in hearing levels, selection or change of frequency, and records of subject responses. Note. Changes in hearing level are controlled by the subject and are automatically recorded. 3.22 Fixed frequency automatic audiometry automaticfixed-frequencyaudiometry A method of audiometry in which the change in the frequency of the hearing level is controlled by the subject and automatically recorded. 3.23 Sweep automatic audiometry automaticsweep-frequencyaudiometry The change in hearing level is controlled by the subject, and the frequency is continuously changed, or the audiometry is much smaller than the 1/3 octave bin. 3.24 Screening audiometry screeningaudiometry A pure tone of a fixed sound level (screening level) is sent to determine whether the subject has heard the audiometry. 3.25 Audiogram The relationship between the hearing threshold level and the frequency of the test ear measured in the form of a graph or a table under specified conditions and measured according to the prescribed method.

4 General questions about audiometry

4.1 Overview The threshold level can be measured by air conduction and bone conduction measurement. The air conduction audiometry sends the test signal to the subject by the earphone, and the bone conduction test method is A bone vibrator located in the mastoid or forehead of the subject sends a test signal. It is recommended to first perform the air conduction threshold level measurement and then perform the bone conduction threshold level measurement. Several fixed frequency test tones (fixed frequency audiometry), or test signals with frequency changing at a predetermined rate over time (sweeping and listening) Method) Determine the threshold of hearing. Chapter 6 gives a fixed frequency listening method, and Chapter 7 describes a frequency sweeping method. In the air conduction and bone conduction test, two The hearing threshold of the ear should be measured separately. Under the specified conditions, the non-test ear (opposite ear......
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