Improving Loudspeaker Transient Response with Digital Signal Processing
The transient response of a loudspeaker represents the combined effect of a multitude of physical behaviors. Some of these behaviors are time-variant, nonlinear, or spatially variable and are not good candidates for digital correction. Others are sufficiently LTI (linear, time-invariant) and sufficiently consistent directionally to be largely correctable with specialized digital filters. In the particular case of high powered, horn-loaded loudspeakers, most of the observed transient misbehavior is the result of stable, correctable phenomena. Consequently, the transient response of such loudspeakers can be significantly improved with signal preconditioning. Measurements of an example loudspeaker demonstrate the improvements that are possible.
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