the purposes were ( a ) to find a limited number of perceptual dimensions suitable for describing variations in perceived sound quality , ( b ) to find the positions of the selected hearing aids in these dimensions , ( c ) to explore the relations between the perceptual dimensions and the physical characteristics of the hearing aids , and ( d ) to explore the relations between the perceptual dimensions and overall evaluations of the selected hearing aids .
C0031809
physical
C0220825
evaluations