This report documents the research and prototyping of a new form of acoustical bass absorber. The bass absorber reduces peak and dip frequency response errors caused by interference from naturally occurring standing waves in rooms. The design uses two forms of simple harmonic resonance: pistonic diaphragm resonance and Helmholtz cavity resonance. The pistonic diaphragm resonance is achieved by attaching a rigid planar membrane to metal springs. The Helmholtz cavity resonance is achieved by constructing an enclosed chamber attached to an open tube. Coupling these two dissipation devices led to several-fold improvement in total room mode attenuation.
Authors:
Reiley, Evan; Grimani, Anthony
Affiliation:
Performance Media Industries Ltd., Fairfax, CA
AES Convention:
114 (March 2003)
Paper Number:
5760
Publication Date:
March 1, 2003
Subject:
Room Acoustics and Sound Reinforcement
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.
To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.
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.