Certain “perceptually consistent” spectral distance measures and their properties when applied to single formant spectra
R. Visvanathan, J. Makhoul, W. Russell · The Journal of the Acoustical Society of America · 1976
Recently, we proposed a class of spectral distance measures to compute the amount of deviation between two smoothed short-time speech spectra [R. Viswanathan et al., “Towards Perceptually Consistent Measures of Spectral Distance,” Proc. IEEE International Conference on Acoust. Speech Signal Process, Philadelphia, pp. 485–488, April 1976]. These measures produce results consistent with published subjective perceptual results on formant frequency difference limen (DL). More recently, we have adjusted these measures, by a process we call “scaling,” such that spectral distances due to formant frequency shifts equal to the DL at each frequency are approximately the same for different formant frequency values. In this paper, we discuss these “scaled” distance measures, and present the results of using the measures with single formant spectra. The results are in the form of plots of spectral distance obtained under different conditions of either formant frequency shift or formant bandwidth shift. Comparisons are made of these data with published subjective DL data. [Work supported by ARPA-IPTO.]