Evaluation of electroacoustic devices by the equivalent scale methods

This paper presents the preliminary results of experiments on the possi-bility of using methods based on the mutual masking of signals compared, in auditory evaluation. An attempt was made to objectivize the measure of the similarity of the signals, or the transmission channel quality, and to evaluate the degree of differentiation of objects investigated on an equivalent physical scale. In the preliminary experiments a number of experimental procedures were examined, two of which, characterized by the relatively highest differen-tiation sensitivity, underwent more detailed evaluation. The results indicated the possibility of objectivizing the measure of the transmission circuit quality in the range of frequency response variation over a third-octave.