التفاصيل البيبلوغرافية
العنوان:
Calculating traffic noise reduction at long distance using diffracting elements
المؤلفون:
Brouns, E. , Eerden, F. van der , Eisses, A.R. , Kruyen, A.H.J. , Vliet, W. van
المصدر:
INTER-NOISE 2018-47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, 47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, INTER-NOISE 2018, 26 August 2018 through 29 August 2018
بيانات النشر:
Institute of Noise Control Engineering, 2018.
سنة النشر:
2018
مصطلحات موضوعية:
Parabolic equation method , Noise pollution , Calculation models , Meteorological effects , Numerical results , Resonators , Noise abatement , Numerical methods , Broad frequency range , National standard , Octave bands , Acoustic variables control
الوصف:
A series of resonators alongside a road or railway can be used to diffract noise upwards to create a zone of noise reduction behind the elements. The company 4Silence developed the so-called Whisstone, a concrete block with 18 resonators of different depths designed to operate in a broad frequency range. Several measurements at short distance, up to 15 meters, have proven that a noise reduction up to 4 dB(A) can be achieved. To determine the noise reduction at long distances calculations are necessary, due to the uncertainties of ground and meteorological effects. In this paper a comparison between measurements and numerical results (FEM) at short distance is presented. The positive results of this comparison allow the numerical method to be applied at larger ranges, up to 600 meters, taking a downwind condition into account. To this end the FEM method is coupled to a Green's function parabolic equation method (GFPE). The calculations for long distances show noise reductions up to 5 dB in octave bands and 3 dB(A) for the broadband level. These results can be used to account for the diffracting elements in standard noise calculation models used in practice, such as the Dutch national standard model or Cnossos. © INTER-NOISE 2018 - 47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering. All rights reserved.
URL الوصول:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::05d847ff6aba7caafc19a11a68d2b08a http://resolver.tudelft.nl/uuid:e3d4a35d-17e3-444f-b968-274eec290c4c
حقوق:
OPEN
رقم الأكسشن:
edsair.dedup.wf.001..05d847ff6aba7caafc19a11a68d2b08a
قاعدة البيانات:
OpenAIRE
