Perceived Sound Quality of Small Original and Optimized
, Uppsala University
Third International Workshop on Perceptual
Quality of Systems (PQS),
Dresden, September 6-8, 2010.
The perceived sound quality of small loudspeaker
systems with and without digital optimization
was empirically evaluated in a listening experiment.
Further, the influence on the results of the
presentation order of the two versions was investigated,
as well as a self-evaluation of potential use for variance reduction.
The systems were optimized by means of FIR filters.
The two versions of each loudspeaker system were
rated in a paired comparison test for music stimuli.
For the purpose of analysis a linear gaussian model
was applied, resulting in an interval scale
revealing interesting information about certainty
and discrimination ability of the subjects.
The test investigated whether linear pre-compensation
of rather cheap systems results in a significant improvement
of the perceived audio quality in a typical listening situation.
The results indicated a significant preference for
the optimized version and a significant dependency on
the presentation order was detected.
The self-evaluation was found to be uncorrelated
to the test results.
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