Automatic bass management

摘要

A method for an automatic equalization of sound pressure levels in at least one listening location is disclosed, where the sound pressure is generated by a first and at least a second loudspeaker. The method comprises: determining the transfer characteristic of each combination of loudspeaker and listening location; calculating a sound pressure level at each listening location assuming for the calculation that an audio signal of a programmable frequency is supplied to each loudspeaker, where the audio signal supplied to the second loudspeaker is phase-shifted by a programmable phase shift relatively to the audio signal supplied to the first loudspeaker, and where the phase shifts of the audio signals supplied to the other loudspeakers are initially zero or constant; providing a cost function dependent on the sound pressure level; and searching a frequency dependent optimal phase shift that yields an extremum of the cost function, thus obtaining a phase function representing the optimal phase shift as a function of frequency.