4aAA3. Computation of impulse response for stage-house geometries with use of edge-diffraction models.

Session: Thursday Morning, June 19


Author: Rendell Torres
Location: Chalmers Rm. Acoust. Group, Dept. of Appl. Acoust., Chalmers Univ. of Tech., S-412 96 Gothenburg, Sweden, rendell@ta.chalmers.se
Author: Mendel Kleiner
Location: Chalmers Rm. Acoust. Group, Dept. of Appl. Acoust., Chalmers Univ. of Tech., S-412 96 Gothenburg, Sweden, rendell@ta.chalmers.se
Author: Peter Svensson
Location: Chalmers Rm. Acoust. Group, Dept. of Appl. Acoust., Chalmers Univ. of Tech., S-412 96 Gothenburg, Sweden, rendell@ta.chalmers.se

Abstract:

A mathematical model following diffraction studies by Medwin [J. Acoust. Soc. Am. 72, 1005--1013 (1982)] is developed to calculate the impulse response of a three-dimensional ``stage house'' geometry in a baffle. The model includes multiple diffraction components in addition to specular reflection, and it forms a more complete approach than current room impulse-response predictors based on geometrical acoustics. Thus it may also be suitable for more accurate auralization, particularly at low frequencies. A comparison is made with results from a ``cone-tracing'' computer model [B. Dalenback, J. Acoust. Soc. Am. 100, 899--909 (1996)] and results from physical scale-model measurements. [Work supported by Axel & Margaret Axson Johnson's Foundation, Sweden.]


ASA 133rd meeting - Penn State, June 1997