This paper presents an enhanced method performing real time adaptive equalization of room acoustics in the frequency domain. The method obtains the frequency response of the room by means of transparent insertion of a certain number of acoustic probe signals into the main audio spectrum. The opportunities for the insertion of tones are identified by means of a spectral analysis of the audio signal based on a psychoacoustic model of frequency masking. This enhanced version of the adaptive equalizer will be explained as well as its real time implementation on a TMS320C6713 DSP based platform. Results of the acoustic tests will be discussed and conclusions about global performance will be presented.

Authors: Ferreira, Aníbal J. S.; Leite, António; Pinto, Francisco; Rocha, Ariel F.
Affiliations: FEUP/INESC; INESC Porto(See document for exact affiliation information.)
AES Convention: 120 (May 2006) Paper Number: 6738
Publication Date: May 1, 2006
Subject: Room and Architectural Acoustics

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