ASA 124th Meeting New Orleans 1992 October

4aAA5. A convolutional model for simulating the response of an electro-acoustic system inside a hall.

Peter Vogel

D. de Vries

Delft Univ. of Technol., Lab. of Seismics and Acoust., P.O. Box 5046, 2600 GA Delft, The Netherlands

In a hall that is equipped with an electroacoustic system (EAS) for the enhancement of reverberation, the reflected sound field is built up by contributions of both system and hall. To quantify the transmission of the sound field from source to listener, from source to EAS microphones, and from EAS loudspeakers to listener, the appropriate hall transfer function should be taken into account. Also, the acoustic coupling between EAS microphones and loudspeakers may play an important role. In this paper, a convolutional model to calculate the complete hall and EAS response will be discussed, using a version of the image source algorithm that can also handle diffuse reflection at room boundaries. The EAS is divided in an early reflection module and a reverberation module. Examples will be shown, ranging from simple situations to complex configurations. Results are in good agreement with measurements.