AES Journal Forum

Designing Low-Frequency Enhanced Loudspeaker Systems Using a Vibration-Absorber Theory

(Subscribe to this discussion)

Document Thumbnail

A universal design procedure has been developed for enhancing the low-frequency response of loudspeakers ranging from handset loudspeakers to large subwoofers. The procedure attempts to find the optimal parameters of a vented-box system on the basis of the vibration-absorber theory. Simulations and experiments were used to validate the optimal design. Design charts and constrained optimization facilitate the design of the acoustic enclosure. Although limitations do not allow for accurate prediction of responses below 100 Hz, the comparison between closed- and vented-box performance correlates well with the desired bass extension.

JAES Volume 57 Issue 3 pp. 131-148; March 2009
Publication Date:

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

(Comment on this report)

Comments on this report

Default Avatar
Jinwei Feng

Comment posted April 4, 2009 @ 16:18:09 UTC (Comment permalink)

I was expecting to see the comparison curves between the proposed design procedure and the conventional design procedure in terms of the low frequency response. How and why is the new procedure better than the conventional one?

Jinwei Feng

Default Avatar
Author Response
Mingsian Bai

Comment posted April 7, 2009 @ 16:14:54 UTC (Comment permalink)

Dear Jinwei Feng:
Thank you for your comments on my paper. I shall try to answer you question as follows.
The main purpose of this paper is to suggest a unified optimization procedure for coupled oscillator problem in loudspeaker design. The design examples given in the paper incidentally fit this category. It is really not our intention to replace traditional methods that are widely used in the community of, for example, bass-reflex systems. We simply want to suggest a systematic and automatic alternative, rather than an empirical approach, which enables us to have more control of design parameters and constraints such as the target bass extension frequency. Our method is in fact quite versatile in that it is applicable to not only common vented-box systems but also unorthodox loudspeaker systems, e.g., the resonant loudspeaker presented in this paper. We found it more flexible than the design using some commercial loudspeaker design software in which only a few fixed alignment are available.
I hope I have answered your question satisfactorily. Thank you again for your interest.

Subscribe to this discussion

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

Join this discussion!

If you would like to contribute to the discussion about this report 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 report 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