In a room with strong low-frequency modes the control of excessively long decays is problematic or impossible with conventional passive means. In this paper we present a systematic methodology for active modal equalization able to correct the modal decay behavior of a loudspeaker room system. Two methods of modal equalization are proposed. The first method modifies the primary sound such that modal decays are controlled. The second method uses separate primary and secondary radiators and controls modal decays with sound fed into the secondary radiator. Case studies of the first method of implementation are presented.

Authors: Karjalainen, Matti; Makivirta, Aki; Antsalo, Poju; Valimaki, Vesa
Affiliations: Genelec Oy, Iisalmi, Finland ; Helsinki University of Technology, Laboratory of Acoustics and Audio Signal Processing, Espoo, Finland(See document for exact affiliation information.)
AES Convention: 111 (November 2001) Paper Number: 5480
Publication Date: November 1, 2001 Import into BibTeX
Subject: Signal Processing
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=9849

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