Abstract
This paper presents a survey of the models and principles that are used in JBL's second generation program CADP2 to predict the performance of complex multi-loudspeaker sound reinforcement systems in real spaces. The paper explains how the image model for polyhydral spaces, statistical room acoustics and complex polar patterns for loudspeakers are combined into time and frequency domain sound field models. The models are applied to predict accurate 1 1 or 1 3 octave band SPLs in frequency and space from complex loudspeaker arrays. The models are also the basis for the prediction of speech intelligibility (ALcons, AI, RASTI and C50/80) from sound reinforcement systems taking propagation and electronic delays, discrete reflections, reverberation and noise into account.
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