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Round Robin Test SPB measurements : final report / A. Bergiers
Brussels : BRRC, 2010
For the revision of standard ISO 11819-1 “Statistical Pass-By method”, which is currently ongoing, ISO/TC43/SC1/WG33 would like to include a method to measure the acoustical quality of a road in a built-up urban environment. The adapted conceived method is called “Backing board method”. Different experiments were performed within the European SILENCE project to assess the accuracy of the method. By installing a board behind the microphone during the measurements, the microphone is protected against noise from behind (for example reflections by facades). The noise coming from the front is reflected by the backing board in a controlled way so that it can be taken into account afterwards. In theory the sound pressure level rises 6 dB(A) with a doubling of the sound pressure caused by the backing board. Different experiments confirm this value for light vehicles as long as the overall level is considered and no spectral analysis of the sound is carried out. In March 2009 one SPB test was performed by BRRC with heavy vehicles. The experiment confirmed that the 6 dB(A) correction was valid for trucks as well. In August 2009 an international round robin test was organized by BRRC near Brussels. Measurements were performed by several participants in free field condition and with backing board. The purpose of the test was to assess the reproducibility of the method. Also the influence of the operator was tested during this round robin test. The results of this RRT are presented and analysed in this report.
For Appendices, see http://www.ocw.be/pdf/15/BRRC_SPB_Appendices.pdf |
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http://www.ocw.be/pdf/15/BRRC_SPB_Report.pdf |
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| content language: |
English |
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| This content is related to: |
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| project type |
| International projects |
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| area of interest |
| noise & vibration |
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| user type |
| road authorities/owners |
| research labs |
| city authorities |
| construction companies |
| material producers |
| consultancies |
| industry |
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created: De Salvador Jésica, 15.03.2010 14:26:54
last modified: De Salvador Jésica, 15.03.2010 14:56:23 |
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