Patent ID: 9497561
Filing Date: 2016-11-15
CPC Classification: H04R,H04S

Claim Text:
1. A multi-speaker sound system to simulate at least one idealized virtual point source, the system comprising: at least one source signal input adapted to receive a respective source signal, there being one source signal input associated with each idealized virtual point source; a plurality of speakers; a plurality of filters; the multi-speaker sound system having a combined speaker transfer function for each source signal input, each combined speaker transfer function for a particular source signal input being a summation in space of the speaker transfer functions of the speakers for that source signal input and representing superpositioned speaker transfer functions of the speakers at notional test points within a notional convexly-bounded listening region; wherein for each combined speaker transfer function, the filter coefficients have respective values that globally minimize in frequency domain, across at least a subset of all frequency bins below a sampling frequency limit, across a frequency-sufficient set of the notional test points having known test point positions relative to notional source positions of the speakers, a total difference between that particular combined speaker transfer function and an idealized transfer function of that particular idealized virtual point source at a specified notional position of that idealized virtual point source relative to the notional source positions of the speakers.