Skip to main content
padlock icon - secure page this page is secure

An Algorithm for Automatic Geometry Simplification for Room Acoustical Simulation Based on Regression Planes

Buy Article:

$30.00 + tax (Refund Policy)

The numerical simulation of room acoustics is based – besides other properties – on the geometry of the evaluated room. During the planning phase of a building, these geometry data are usually available as a closed polyhedron stored in a computer readable CAD file format, that was prepared for other purposes as, e.g., visualisation. These geometry data must be processed to extract a reasonable small number of acoustically appropriate polygons to reduce calculation times for the simulation of room acoustics. The size of the appropriate polygons is closely related to the sound wave length.

This paper presents an algorithm to reduce the number of polygons by iteratively replacing a group of polygons by a bigger polygon. This polygon is defined by a regression plane minimizing the squared distances of the points in the polygons of the group. The group of polygons is a growing set containing polygons with vertices within a layer of limited thickness around the intermediate regression plane. This thickness can be adopted to the examined wavelength.

Besides the presentation of the basic algorithm with examples, some hints for the practical application in room acoustics are discussed together with the possibility to use intermediate results from the calculation of the regression planes to estimate the additional scattering coefficients that are necessary to model the original roughness of the simplified surface.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Publication date: September 1, 2014

More about this publication?
  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
  • Editorial Board
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Information for Advertisers
  • Online User License
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more