AS 1191-1985

1 - AS 1191-1985 ACOUSTICS - METHOD FOR LABORATORY MEASUREMENT OF AIRBORNE SOUND TRANSMISSION LOSS OF BUILDING PARTITIONS
4 - PREFACE
4 - CONTENTS
5 - SECTION 1. SCOPE AND GENERAL
5 - 1.1 SCOPE
5 - 1.2 APPLICATION
5 - 1.3 REFERENCED DOCUMENTS.
5 - 1.4 GENERAL DESCRIPTION OF METHOD
5 - 1.4.1 Building facilities
5 - 1.4.2 Electro-acoustic equipment
5 - 1.4.3 Procedures
6 - 1.4.4 Calculations
6 - 1.5 DEFINITIONS
6 - 1.5.1 Average sound pressure level
6 - 1.5.2 Average sound pressure level difference
6 - 1.5.3 Receiving room equivalent absorption area (A)
6 - 1.5.4 Sound transmission loss (R)
7 - SECTION 2. REQUIREMENTS FOR MEASUREMENTS
7 - 2.1 DIFFUSION
7 - 2.2 FLANKING TRANSMISSION
7 - 2.3 SOUND GENERATION
7 - 2.4 TEST FREQUENCIES
7 - 2.5 FILTERS
7 - 2.5.1 Measurement filter
7 - 2.5.2 Source filter
7 - 2.6 MICROPHONES AND MEASURING SYSTEMS
7 - 2.7 TEST SPECIMEN
7 - 2.8 MICROPHONE LOCATION
7 - 2.9 AVERAGING TIMES
7 - 2.9.1 Discrete microphone position
7 - 2.9.2 Continuous microphone traverse
8 - 2.10 BACKGROUND NOISE
8 - 2.11 EQUIVALENT ABSORPTION AREA
9 - SECTION 3. REPORT ON RESULTS
9 - 3.1 INFORMATION TO BE SUPPLIED
10 - APPENDIX A - ADDITIONAL INFORMATION RELATING TO THE LABORATORY MEASUREMENT OF AIRBORNE SOUND TRANSMISSION LOSS
10 - A1 SCOPE
10 - A2 RECEIVING ROOM EQUIVALENT ABSORPTION AREA
10 - A3 REQUIREMENTS FOR MEASUREMENTS
10 - A3.1 Test room diffusion
10 - A3.1.1 General
10 - A3.1.2 Room volume
10 - A3.1.3 Room dimensions
10 - A3.1.4 Specimen frame
10 - A3.1.5 Room shape and diffusers
11 - A3.1.6 Sound absorption coefficients of surfaces
11 - A3.2 Flanking transmission
11 - A3.2.1 General
11 - A3.2.2 Cross-talk
11 - A3.3 Corrections for background noise
11 - A3.4 Sound generation
11 - A3.5 Test specimen
11 - A3.5.1 Installation
12 - A3.5.2 Ageing
12 - A3.5.3 Filler walls
12 - A4 NUMBER AND PRECISION OF MEASUREMENTS
12 - A4.1 General
12 - A4.2 Method of estimating precision-discrete microphone positions or equivalent
13 - A4.3 Method of estimating precision-continuous averaging over one whole microphone traverse
13 - A4.4 Recommended goals for precision