Traditionally, electronic equalization has used linear filters of low complexity. The nature of spectral and temporal distortions of rooms limits useful equalization to minimum-phase filters of relatively low order, despite the existence of new and powerful digital signal processing tools. The high Q and non-minimum-phase nature of the room loudspeaker 'listener transfer function, caused by wave interference effects, creates severe problems for more complete equalization. A typical professional listening room and three cinema acoustic environments were used to investigate the difficulties inherent for more ambitious equalization approaches.
Fielder, Louis D.
Affiliation: Dolby Laboratories Inc., San Francisco, CA
JAES Volume 51 Issue 1/2 pp. 3-26; February 2003
Publication Date: January 15, 2003
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