In multi-channel reproduction of spatial audio with first-order Ambisonics the loudspeaker signals are relatively coherent, which produces prominent coloration. The coloration artifacts have been suggested to depend on the acoustics of the listening room. This dependency was researched with subjective listening tests in an anechoic chamber with an octagonal loudspeaker setup. Different virtual listening rooms were created by adding diffuse reverberation with 0.25 seconds RT60 using a 3D 16-channel loudspeaker setup. In the test, the sub jects compared the audio quality in the virtual rooms. The results suggest that optimal audio quality was obtained when the virtual room effect and the direct sound were on equal level at the listening position.

Authors: Santala, Olli; Vertanen, Heikki; Pekonen, Jussi; Oksanen, Jan; Pulkki, Ville
Affiliations: Helsinki University of Technology, Espoo, Finland; University of Helsinki, Helsinki, Finland(See document for exact affiliation information.)
AES Convention: 126 (May 2009) Paper Number: 7664
Publication Date: May 1, 2009
Subject: Recording, Reproduction, and Delivery

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