Bass traps, regardless of their effectiveness in abating bass acoustic coloration in a room have two, somewhat undesirable attributes: 1) large size and 2) lack of adaptability. An alternative to the use of bass traps, discussed in this paper, is incorporating a properly devised, feedback control scheme into a powered subwoofer making the subwoofer to exhibit the same dynamics as that of a bass trap. This patent pending, active coloration control solution which can be viewed as an' electronic bass trap 'adds acoustic damping to the low-frequency modes of a room. In addition to a powered subwoofer, the electronic bass trap uses a microphone and an op-amp circuit. Numerical and experimental results indicate the effectiveness of the electronic bass trap in adding acoustic damping to the low-frequency standing wave (s) in a room.

Authors: Kashani, Reza; Wischmeyer, James
Affiliations: University of Dayton, Dayton, OH ; Bag End Loudspeakers, Barrington, IL(See document for exact affiliation information.)
AES Convention: 117 (October 2004) Paper Number: 6277
Publication Date: October 1, 2004
Session Subject: Room and Architectural Acoustics; Sound Reinforcement

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