Psychoacoustic limitations of discrete infinite impulse response and finite impulse response auralizations.

Abstract

Auralizations based on discrete infinite impulse response (DIIR) filters having coefficients derived from statistical reverberation type analyzes are relatively quick and easy to produce but have limitations. Auralizations of very small rooms, or very large rooms having little acoustic treatment, or rooms having dissonant eigenmodes may sound less than real. Auralizations based on discrete finite impulse response (DFIR) filters having coefficients derived from finite element type analyzes can avoid these effects. In both DIIR and DFIR methods, filter coefficient spacing and polarity has a large effect on simulation quality. In this study, auralizations of a test room are created from recorded impulses, derived DFIRs and calculated DIIRs. Sound clips produced by each method are rated using audition and psychoacoustic measures of roughness, fluctuation and sharpness. This paper addresses (1) the derivation of DIIR based auralization from statistical reverberation analysis, (2) the derivation of DFIR based a...