Effect of Listening Room on Audio Quality in Ambisonics Reproduction
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.
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