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
Subject: Signal Processing

Click to purchase paper as a non-member or you can login as an AES member to see more options.

No AES members have commented on this paper yet.

Subscribe to this discussion

To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Start a discussion!

If you would like to start a discussion about this paper and are an AES member then you can login here:
Username:
Password:

If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.