AS/NZS ISO 8253.1:2019
Acoustics - Audiometric test methods - Part 1: Pure-tone air and bone conduction audiometry
Specifies procedures and requirements for pure-tone air conduction and bone conduction threshold audiometry. For screening purposes, only pure-tone air conduction audiometric test methods are specified. It is possible that the procedures are not appropriate for special populations, e.g. very young children. This standard does not cover audiometric procedures to be carried out at levels above the hearing threshold levels of the subjects. Procedures and requirements for speech audiometry, electrophysiological audiometry, and where loudspeakers are used as a sound source are not specified. Identical to and reproduced from ISO 8253-1:2010.
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AS/NZS ISO 8253.1:2019 Audiometric test methods Pure-tone air and bone conduction audiometry
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 General aspects of audiometric measurements
4.1 General
4.2 Standard reference zero for the calibration of audiometric equipment
4.3 Requirements on audiometric equipment
4.4 Qualified tester
4.5 Test time
4.6 Conditions for audiometric test environments
4.7 Measurement uncertainty
5 Preparation and instruction of test subjects before audiometric testing and positioning of transducers
5.1 Preparation of test subjects
5.2 Instruction of test subjects
5.3 Placement of transducers
6 Air conduction hearing threshold level determinations using fixed-frequency audiometry
6.1 General
6.2 Manually controlled threshold determination
6.2.1 Presentation and interruption of test tones
6.2.2 Initial familiarization
6.2.3 Hearing threshold measurements with and without masking
6.2.4 Calculation of hearing threshold level
6.3 Hearing threshold determination with an automatic recording audiometer
6.3.1 General
6.3.2 Presentation of test tone
6.3.3 Familiarization
6.3.4 Hearing threshold level measurements
6.3.5 Calculation of hearing threshold level
6.4 Computer-controlled threshold determination
7 Air conduction hearing threshold level determinations using sweep-frequency audiometry
7.1 General
7.2 Presentation of test tone
7.3 Familiarization
7.4 Hearing threshold level measurement
7.5 Calculation of hearing threshold level at a specified frequency
8 Bone conduction hearing threshold audiometry
8.1 Method of audiometry
8.2 Occlusion
8.3 Airborne sound radiation from the bone vibrator
8.4 Vibrotactile sensation
8.5 Procedures for testing with masking in bone conduction audiometry
9 Screening audiometry
9.1 General
9.2 Procedure for the screening test
9.2.1 General
9.2.2 Manually controlled screening test
9.2.3 Computer-controlled screening test
10 Audiograms
11 Permissible ambient noise
11.1 Permissible ambient noise for threshold determinations
11.2 Psycho-acoustic check on ambient noise
12 Maintenance and calibration of audiometric equipment
12.1 General
12.2 Intervals between checks
12.3 Stage A — Routine checking and subjective tests
12.3.1 General
12.3.2 Tests and checking procedures
12.4 Stage B — Periodic objective checks
12.5 Stage C — Basic calibration tests
Annex A (informative) Measurement uncertainty
Bibliography
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AS/NZS ISO 8253.1:2019 Audiometric test methods Pure-tone air and bone conduction audiometry
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 General aspects of audiometric measurements
4.1 General
4.2 Standard reference zero for the calibration of audiometric equipment
4.3 Requirements on audiometric equipment
4.4 Qualified tester
4.5 Test time
4.6 Conditions for audiometric test environments
4.7 Measurement uncertainty
5 Preparation and instruction of test subjects before audiometric testing and positioning of transducers
5.1 Preparation of test subjects
5.2 Instruction of test subjects
5.3 Placement of transducers
6 Air conduction hearing threshold level determinations using fixed-frequency audiometry
6.1 General
6.2 Manually controlled threshold determination
6.2.1 Presentation and interruption of test tones
6.2.2 Initial familiarization
6.2.3 Hearing threshold measurements with and without masking
6.2.4 Calculation of hearing threshold level
6.3 Hearing threshold determination with an automatic recording audiometer
6.3.1 General
6.3.2 Presentation of test tone
6.3.3 Familiarization
6.3.4 Hearing threshold level measurements
6.3.5 Calculation of hearing threshold level
6.4 Computer-controlled threshold determination
7 Air conduction hearing threshold level determinations using sweep-frequency audiometry
7.1 General
7.2 Presentation of test tone
7.3 Familiarization
7.4 Hearing threshold level measurement
7.5 Calculation of hearing threshold level at a specified frequency
8 Bone conduction hearing threshold audiometry
8.1 Method of audiometry
8.2 Occlusion
8.3 Airborne sound radiation from the bone vibrator
8.4 Vibrotactile sensation
8.5 Procedures for testing with masking in bone conduction audiometry
9 Screening audiometry
9.1 General
9.2 Procedure for the screening test
9.2.1 General
9.2.2 Manually controlled screening test
9.2.3 Computer-controlled screening test
10 Audiograms
11 Permissible ambient noise
11.1 Permissible ambient noise for threshold determinations
11.2 Psycho-acoustic check on ambient noise
12 Maintenance and calibration of audiometric equipment
12.1 General
12.2 Intervals between checks
12.3 Stage A — Routine checking and subjective tests
12.3.1 General
12.3.2 Tests and checking procedures
12.4 Stage B — Periodic objective checks
12.5 Stage C — Basic calibration tests
Annex A (informative) Measurement uncertainty
Bibliography
AS/NZS ISO 8253.1:2019
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.