Patent ID: 8081766

Claim:
A method of creating a digital signal processing (DSP) filter to improve the transient response of a loudspeaker, wherein the loudspeaker is formed of multiple components, the method comprising: identifying a loudspeaker mechanism causing transient response distortion, wherein the transient response distortion of the identified loudspeaker mechanism is substantially linear; wherein the transient response distortion of the identified loudspeaker mechanism does not vary over time; wherein the transient response distortion of the identified loudspeaker mechanism does not vary with respect to a direction away from the loudspeaker; and wherein the identified loudspeaker mechanism includes a physical behavior of a loudspeaker component; characterizing the identified mechanism by mathematically modeling the physical behavior of the loudspeaker component and by performing electrical impedance measurements of the loudspeaker component; determining the characterized mechanism's two-port response; establishing a target response for the characterized mechanism; calculating an ideal filter to achieve the target response; and designing a cost-reduced filter based on the ideal filter to thereby form a loudspeaker mechanism algorithm (LMA) filter.