BS EN 1793-5:2016:2018 Edition
$198.66
Road traffic noise reducing devices. Test method for determining the acoustic performance – Intrinsic characteristics. In situ values of sound reflection under direct sound field conditions
| Published By | Publication Date | Number of Pages |
| BSI | 2018 | 62 |
This European Standard describes a test method for measuring a quantity representative of the intrinsic characteristics of sound reflection from road noise reducing devices: the reflection index.
The test method is intended for the following applications:
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determination of the intrinsic characteristics of sound reflection of noise reducing devices to be installed along roads, to be measured either on typical installations alongside roads or on a relevant sample section;
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determination of the in situ intrinsic characteristics of sound reflection of noise reducing devices in actual use;
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comparison of design specifications with actual performance data after the completion of the construction work;
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verification of the long term performance of noise reducing devices (with a repeated application of the method).
The test method is not intended for the following applications:
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determination of the intrinsic characteristics of sound reflection of noise reducing devices to be installed in reverberant conditions, e.g. inside tunnels or deep trenches.
Results are expressed as a function of frequency, in one-third octave bands between 100 Hz and 5 kHz. If it is not possible to get valid measurements results over the whole frequency range indicated, the results should be given in a restricted frequency range and the reasons of the restriction(s) should be clearly reported.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 48 | Annex A (informative) Measurement uncertainty A.1 General A.2 Measurement uncertainty based upon reproducibility data A.3 Standard deviation of repeatability and reproducibility of the sound reflection index |
| 50 | Annex B (informative)Template of test report on sound reflection of road noise barriers B.1 Overview |
| 52 | B.2 Test setup (example) |
| 53 | B.3 Test object and test situation (example) |
| 55 | B.4 Test Results (example) B.4.1 Part 1 – Results in tabular form |
| 56 | B.4.2 Part 2 – Results in graphic form B.5 Uncertainty (example) |
| 58 | Annex C (informative)Near field to far field relationship |
