Standard
Track updates
AS/NZS ISO 8253.2:2019
[Current]Acoustics — Audiometric test methods, Part 2: Sound field audiometry with pure-tone and narrow-band test signals
The objective of this Standard is to specify relevant test signal characteristics, requirements for free, diffuse, and quasi-free sound fields, and procedures for sound field audiometry using pure tones, frequency-modulated tones or other narrow-band test signals presented by means of one or more loudspeakers.
Published: 11/03/2019
Pages: 16
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Test signal characteristics
4.1 General
4.2 Pure tones
4.3 FM tones
4.4 Narrow bands of noise
4.5 Harmonic distortion
4.6 Signal gating
4.7 Signal level control
4.7.1 Step size
4.7.2 Accuracy
4.7.3 Dynamic range
4.8 Means and scales for calibration
5 Sound field characteristics
5.1 General
5.2 Free sound field
5.3 Diffuse sound field
5.4 Quasi-free sound field
6 Ambient noise levels in the test room
7 Preparation and instruction of test subject
8 Determination of hearing threshold level
8.1 General
8.2 Monaural testing
8.3 Binaural testing
9 Testing with a hearing aid
10 Screening audiometry
11 Reporting of data
11.1 General
11.2 Equipment calibrated by hearing level
11.3 Equipment calibrated by sound pressure level
12 Maintenance and calibration of equipment
12.1 General
12.2 Intervals between tests
12.3 Stage A: routine examination and listening tests
12.4 Stage B: periodic electroacoustic tests
12.5 Stage C: basic calibration tests
Annex A
Annex B
Bibliography
Cited references in this standard
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