| Zugriffsnummer | 24968 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Comparison of ray model based on standardized guidelines and numerical simulations for complex geometries |
| Autor(in); Institution |
Schirmer, Kai; Bonk-Maire-Hoppmann GbR, Garbsen, GERMANY
Langer, Sabine; Institut für Angewandte Mechanik, TU Braunschweig, GERMANY
Schmelzer, Martin; 1.7, Akustik und Dynamik, PTB-Braunschweig
|
| Quelle/Jahr | Recent developments in acoustics, noise and vibration : the 17th International Congress on Sound and Vibration, ICSV17 ; proceedings:(2010) |
| Availability | [CD-ROM] ; file name: papers\\910.pdf |
| Herausgeber(in) |
Elnady, Tamer
|
| Verlag | Cairo: IIAV |
| Konferenzangaben | International Congress on Sound and Vibration - ICSV17, Cairo, 18-22, July, 2010, Egypt |
| Freie Schlagworte | sound immission ; delivery zone ; prediction ; ray model of sound propagation ; reflection ; diffraction ; model scale measurement |
| Zusammenfassung | Noise is an increasing problem in highly populated areas. Besides traffic noise the immissions from commercial usages are often very annoying. Many commercial usages require the delivery of different goods by trucks which is a source of major disturbance. One frequent example of main relevance in urban areas is the noise immission from delivery processes at supermarkets. In the field of environmental noise protection the detailed prediction of sound pressure level distributions based on calculations is one of the main topics. We will show that employing standard prediction models based on guidelines leads to uncertainty of the prediction of sound fields for complex geometric situations. For these situations the underlying assumptions for standard prediction (geometry dimensions large compared to wavelength, medium diffraction angles, diffraction contribution based on plane waves) are not valid. Hence a more reliable prediction is desirable. The idea is to bypass the complex geometry and its multi-reflecting sound paths using wave based descriptions. We use the Boundary Element Method for simulation and additional "in situ" measurements of a scaled model of the situation. The result is a realistic distribution of sound considering multiple reflections and diffraction. In our talk the approach and the results of measurements and simulations will be presented. A comparison with the results acquired by standard procedure will be given. |
