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.]