perceived sound quality of loudspeakers , headphones , and hearing aids was investigated by multivariate techniques from experimental psychology with the purpose ( a ) to find out and interpret the meaning of relevant dimensions in perceived sound quality , ( b ) find out the positions of the investigated systems in these dimensions , ( c ) explore the relations between the perceptual dimensions and the physical characteristics of the systems , and ( d ) explore the relations between the perceptual dimensions and overall evaluations of the systems .
C0031809
physical
C0220825
evaluations