In order to reduce the box volume of so-called bandpass loudspeaker enclosures, a relatively long port is needed. A major problem is then the occurrence of acoustic resonances in the port, resulting in the distortion and coloring of sound. This paper describes a method of eliminating the disturbing resonance peaks, without affecting the efficiency of the system. In a theoretical model, the influence of a branched Helmholtz resonator is outlined, and the resulting measurements concur with theory.

Author: Nieuwendijk, Joris A.
Affiliation: Philips Consumer Electronics, Eindhoven, Netherlands
AES Convention: 94 (March 1993) Paper Number: 3508
Publication Date: March 1, 1993
Subject: Transducers

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