Compensation of the displacement of a loudspeaker's diaphragm caused by an adjacent loudspeaker
Oscar Albinsson · Chalmers Publication Library (Chalmers University of Technology) · 2009
In two-way loudspeaker systems the sound pressure from the low frequency woofer will affect the position of the high frequency tweeters diaphragm.Two solutions for reducing the movement of the diaphragm are presented, in which the induced current is cancelled by a current with opposite phase.Both solutions rely on a filter that mixes in a cancellation voltage at the tweeter, where the input signals are the applied voltage at the woofer and the resulting induced current.A static filter has been implemented based on sweep measurements, and a suggestion of an adaptive filter solution based on the least mean squares (LMS) algorithm is also presented. Rev.