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Homepage>23/30468476 DC Draft BS EN 1793-5. Road traffic noise reducing devices. Test method for determining the acoustic performance Part 5: Intrinsic characteristics. In situ values of sound reflection under direct sound field conditions
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sklademVydáno: 2023-08-24
23/30468476 DC Draft BS EN 1793-5. Road traffic noise reducing devices. Test method for determining the acoustic performance Part 5: Intrinsic characteristics. In situ values of sound reflection under direct sound field conditions

23/30468476 DC

Draft BS EN 1793-5. Road traffic noise reducing devices. Test method for determining the acoustic performance Part 5: Intrinsic characteristics. In situ values of sound reflection under direct sound field conditions

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Označení normy:23/30468476 DC
Počet stran:74
Vydáno:2023-08-24
Status:Draft for Comment
DESCRIPTION

23/30468476 DC


This standard 23/30468476 DC Draft BS EN 1793-5. Road traffic noise reducing devices. Test method for determining the acoustic performance is classified in these ICS categories:
  • 17.140.30 Noise emitted by means of transport
  • 93.080.30 Road equipment and installations
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: - 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; - determination of the in situ intrinsic characteristics of sound reflection 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). The test method is not intended for the following applications: - 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 shall be given in a restricted frequency range and the reasons of the restriction(s) shall be clearly reported.