AES Journal Forum

Flat-Panel Loudspeaker Simulation Model with Electromagnetic Inertial Exciters and Enclosures

Document Thumbnail

Flat-panel loudspeakers, often called Distributed-Mode Loudspeakers (DMLs), are created by using one or more force exciters to induced vibrations in an elastic flat surface. This report describes a lumped element equivalent model of a flat-panel loudspeaker including multiple bending modes of an elastic plate, the dynamical influence of affixed inertial exciters, and the contribution of the enclosure. Unlike a classical loudspeaker driver, flat panels have many more degrees of freedom. The panel’s natural resonant frequencies are shifted by the dynamical coupling to the exciters and the enclosure. Three important design aspects are illustrated through simulations: (1) the effective low-frequency cutoff of the flat-panel speaker is determined by the higher of either the exciter resonant frequencies or the lowest panel resonant mode; (2) rigidly backed exciters can be employed to avoid mode-splitting at low frequencies, and (3) achieving resonances below 100 Hz with a panel mounted near a wall requires the use of panels with considerable mass. Experimentally, the models were shown to accurately predict the vibrational behavior of a panel with resonant exciters and a rear enclosure.

JAES Volume 65 Issue 9 pp. 722-732; September 2017
Publication Date:

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

RSS Feed 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:

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.

AES - Audio Engineering Society