A mathematical model for objective assessment of perceived spatial quality was developed for comparison across the listening area of various sound reproduction systems: mono, two-channel stereo (TCS), 3/2 stereo (5.0 surround sound), Wave Field Synthesis (WFS) and Higher Order Ambisonics (HOA). Models for mono, TCS and 3/2 stereo are based on conventional microphone techniques and loudspeaker configurations for each system. WFS and HOA models use circular arrays of thirty-two loudspeakers, driven by signals derived from a virtual microphone array and the Fourier-Bessel spatial decomposition of the sound field respectively. Directional localisation, ensemble width and ensemble envelopment of tones, extracted from binaural signals, are analysed under a range of test conditions.

Authors: Dewhirst, Martin; Jackson, Philip; Rumsey, Francis; Zielinski, Slawomir K.
Affiliation: University of Surrey
AES Convention: 118 (May 2005) Paper Number: 6441
Publication Date: May 1, 2005
Subject: Spatial Perception and Processing

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