The finite-element loudspeaker model presented in Part 1 is extended to three applications. Firstly, we study the effect of a significant increase of the magnetic motor strength Bl on the breakup modes and other resonances of a typical driver. Approximations to the theory allow modal decomposition even when the loudspeaker voice coil is driven from a normal amplifier, showing that the modes most affected are those for which the back-emf due to voice-coil motion is strong. Secondly, we probe how the shape of the cone influences the resonances, breakup, and acoustic performance. Cones that flare outwards have the most desirable characteristics. A final third study concerns the result of a change in the distribution of the damping and stiffness of parts of the driver, to see if useful characteristics ensue. The model is also used to investigate some aspects of measurements.

Authors: Geaves, Gary P.; Henwood, David J.; Vanderkooy, John
Affiliations: B&W Loudspeaker Research Centre; University of Waterloo(See document for exact affiliation information.)
AES Convention: 119 (October 2005) Paper Number: 6593
Publication Date: October 1, 2005
Subject: Loudspeakers

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.