BS 7636(1993) : 1993 AMD 10028

Committees responsible
National foreword
Method
Introduction
1 Scope
2 Normative references
3 Definitions
4 Test signal characteristics
5 Sound field characteristics
6 Ambient noise levels in the test room
7 Preparation and instruction of test subject
8 Determination of hearing threshold level
9 Testing with a hearing aid
10 Screening audiometry
11 Reporting of data
12 Maintenance and calibration of equipment
Annexes
A (informative) Graphical display of results
B (informative) Correction values for 45 deg and 90
     deg angles of incidence
C (informative) Bibliography
Tables
1 Microphone requirements for diffuse sound field
     measurement
2 Maximum permissible ambient sound pressure levels
     in one-third-octave bands, Lmax, for sound field
     audiometry
A.1 Symbols for test conditions
B.1 Increase in sound pressure level at the ear closest
     to the loudspeaker
Figures
A.1 Hearing threshold levels
A.2 Threshold sound pressure levels

Specifies relevant test signal characteristics, requirements for diffuse, free 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 using one or more loudspeakers. Does not include specifications for the use of hand-held loudspeakers. Does not cover speech as a test signal. Includes definitions, annexes, tables and diagrams. BS AMD 10028 RENUMBERS STANDARD