Sound atmospheric attenuation is a relevant aspect of realistic space modeling in 3-D audio simulation systems. A digital filter has been developed on commercial DSP processors to match air absorption curves. This paper focuses on the algorithm implementation of a digital filter with continuous roll-off control, to simulate high frequency damping of audio signals in various atmospheric conditions, along with rules to allow a precise approximation of the behavior described by analytical formulas.

Authors: Petruzzellis, Carlo; Zanghieri, Umberto
Affiliation: ZP Engineering S.r.L., Rome, Italy
AES Convention: 134 (May 2013) Paper Number: 8888
Publication Date: May 4, 2013
Subject: Room Acoustics

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