Patent ID: 9065411
Filing Date: 2015-06-23
Classification: H03G,H04R,H04S

Abstract:
1. A method for determining an equalization filter for one or more loudspeakers provided in an enclosure, such as a listening room or an automobile cabin, the method comprising the steps of: providing said one or more loudspeakers with an audio input signal whereby a sound field is generated in the enclosure, a power averaged sound pressure emitted from the one or more loudspeakers into said enclosure by power averaging a number of measured sound pressures at a number N of positions in the enclosure; determining an acoustic contribution or room gain RG(f) of the enclosure to the generated sound field, by forming a speaker equalization filter Speaker(f) as the square root of the ratio between a target acoustic power output and the actual acoustic power output from the loudspeaker driver(s) of the respective one or more loudspeakers, which actual acoustic power output is calculated as the square of the power averaged sound pressure divided by the room gain RG(f); and determining said equalization filter as said speaker equalization filter Speaker(f).