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BS EN 1793-6:2018+A1:2021

BS EN 1793-6:2018+A1:2021

$198.66

Road traffic noise reducing devices. Test method for determining the acoustic performance – Intrinsic characteristics. In situ values of airborne sound insulation under direct sound field conditions

Published By Publication Date Number of Pages
BSI 2021 54
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This document describes a test method for measuring a quantity representative of the intrinsic characteristics of airborne sound insulation for traffic noise reducing devices: the sound insulation index.

The test method is intended for the following applications:

  • determination of the intrinsic characteristics of airborne sound insulation of noise reducing devices to be installed along roads, to be measured either in situ or in laboratory conditions;

  • determination of the in situ intrinsic characteristics of airborne sound insulation of noise reducing devices in actual use;

  • comparison of design specifications with actual performance data after the completion of the construction work;

  • verification of the long term performance of noise reducing devices (with a repeated application of the method);

  • interactive design process of new products, including the formulation of installation manuals.

The test method is not intended for the determination of the intrinsic characteristics of airborne sound insulation of noise reducing devices to be installed in reverberant conditions, e.g. inside tunnels or deep trenches or under covers.

Results are expressed as a function of frequency in one-third octave bands, where possible, between 100 Hz and 5 kHz. If it is not possible to get valid measurement results over the whole frequency range indicated, the results will be given in a restricted frequency range and the reasons for the restriction(s) will be clearly reported.

PDF Catalog

PDF Pages PDF Title
2 undefined
9 1 Scope
2 Normative references
10 3 Terms and definitions
14 4 Sound insulation index measurements
4.1 General principle
4.2 Measured quantity
15 4.3 Test arrangement
20 4.4 Measuring equipment
4.4.1 Components of the measuring system
4.4.2 Sound source
4.4.3 Test signal
21 4.5 Data processing
4.5.1 Calibration
4.5.2 Sample rate
22 4.5.3 Background noise
4.5.4 Scanning technique using a single microphone
4.5.5 Scanning technique using nine microphones
23 4.5.6 Adrienne temporal window
24 4.5.7 Placement of the Adrienne temporal window
25 4.5.8 Low frequency limit and sample size
26 4.6 Positioning of the measuring equipment
4.6.1 Selection of the measurement positions
27 4.6.2 Post measurements
4.6.3 Additional measurements
4.6.4 Reflecting objects
4.6.5 Safety considerations
28 4.7 Sample surface and meteorological conditions
4.7.1 Condition of the sample surface
4.7.2 Wind
4.7.3 Air temperature
4.8 Single-number rating
4.8.1 General
4.8.2 Acoustic elements
29 4.8.3 Posts
4.8.4 Global
30 5 Measurement uncertainty
6 Measuring procedure
31 7 Test report
33 Annex A (informative)Categorization of single-number rating
34 Annex B (informative)Guidance note on use of the single-number rating
35 Annex C (informative)Measurement uncertainty
C.1 General
C.2 Measurement uncertainty based upon reproducibility data
C.3 Standard deviation of repeatability and reproducibility of the sound insulation index
38 Annex D (informative)Template of test report on airborne sound insulation of road traffic noise reducing devices
D.1 General
40 D.2 Test setup (example)
41 D.3 Test object and test situation (example)
44 D.4 Results (example)
D.4.1 Part 1 – Results for ‘element’ in tabular form
45 D.4.2 Part 2 – Results for ‘element’ in graphic form
D.4.3 Part 3 – Results for ‘post’ in tabular form
46 D.4.4 Part 4 – Results for ‘post’ in graphic form
47 D.4.5 Part 5 – Results for global condition (average of ‘element’ and ‘post’) in tabular form
48 D.4.6 Part 6 – Results for global condition (average of ‘element’ and ‘post’) in graphic form
D.5 Uncertainty (example)

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BS EN 1793-6:2018+A1:2021
$198.66