Table of Contents

1 -  AS 3657.2-1996 ACOUSTICS-EXPRESSION OF THE SUBJECTIVE MAGNITUDE OF SOUND OR NOISE - METHOD FOR CALCULATING LOUDNESS LEVEL
4 -  PREFACE
5 -  CONTENTS
7 -  0 INTRODUCTION
8 -  SECTION ONE METHOD A FOR CALCULATING THE LOUDNESS OF A COMPLEX SOUND THAT HAS BEEN ANALYSED IN TERMS OF OCTAVE BANDS
8 -  1 GENERAL
8 -  2 SCOPE AND FIELD OF APPLI CATION
8 -  2.1 Diffuse sound field
8 -  2.2 Kind of spectrum
8 -  2.3 Steady state
8 -  3 DEFINITIONS
8 -  3.1 sound pressure level
8 -  3.2 band pressure level
9 -  3.3 loudness (S) in sones
9 -  3.4 loudness-loudness level relation
9 -  3.5 loudness index:
9 -  4 SPECIFICATION
9 -  4.1 Calculated loudness
9 -  4.2 Calculated loudness level
9 -  4.3 Table of loudness index
12 -  SECTION TWO METHOD B FOR CALCULATING THE LOUDNESS OF A COMPLEX SOUND THAT HAS BEEN ANALYSED IN TERMS OF ONE-THIRD OCTAVE BAND
12 -  5 GENERAL
12 -  6 SCOPE AND FIELD OF APPLI CATION
12 -  6.1 Frontal sound
12 -  6.2 Diffuse field
12 -  7 DEFINITI ONS
12 -  7.1 band pressure level
12 -  7.2 critical bands
13 -  7.3 calculated loudness level:
13 -  8 SPECIFICATION
13 -  Step 1
13 -  Step 2
13 -  Step 3
24 -  ANNEX A - BIBLIOGRAPHIC REFERENCES (Method A)
24 -  ANNEX B - BIBLIOGRAPHICAL REFERENCES (Method B)

Abstract

Specifies two methods for calculating the loudness level of a complex sound in terms of a single number calculated from a spectrum analysis. Method A utilizes physical measurements obtained from spectrum analysis in terms of octave bands. Method B utilizes spectrum analysis in terms of one-third octave bands. This Standard is identical with and has been reproduced from ISO 532:1975.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
ProductNote	Pending Revision indicates that as a result of the Aged Standards review process, the document needs updating. If no project proposal, meeting the quality criteria, is received within the 12 month timeframe, the document shall be withdrawn.
Pages
ISBN
Committee	AV-001
Under Revision	DR AS ISO 532.2:2018 DR AS ISO 532.1:2018
Supersedes	DR 94254