US 9,813,835 B2
Sound system for establishing a sound zone
Markus Christoph, Straubing (DE)
Assigned to Harman Becker Automotive Systems GmbH, Karlsbad (DE)
Filed by Harman Becker Automotive Systems GmbH, Karlsbad (DE)
Filed on Nov. 19, 2015, as Appl. No. 14/946,450.
Claims priority of application No. 14193885 (EP), filed on Nov. 19, 2014.
Prior Publication US 2016/0142852 A1, May 19, 2016
Int. Cl. H04R 5/02 (2006.01); H04S 7/00 (2006.01); H04R 5/04 (2006.01); H04R 3/12 (2006.01); H04S 3/02 (2006.01)
CPC H04S 7/303 (2013.01) [H04R 5/02 (2013.01); H04R 5/04 (2013.01); H04S 7/305 (2013.01); H04R 3/12 (2013.01); H04R 2499/13 (2013.01); H04S 3/02 (2013.01); H04S 2400/09 (2013.01); H04S 2400/11 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A sound system for acoustically reproducing electrical audio signals and establishing sound zones, in each of which reception sound signals occur that provide an individual pattern of the reproduced and transmitted electrical audio signals, the system comprising:
a signal processing arrangement that is configured to process the electrical audio signals to provide processed electrical audio signals;
groups of loudspeakers that are arranged at positions separate from each other and within or adjacent to the sound zones, each of the groups of loudspeakers is configured to convert the processed electrical audio signals into corresponding acoustic audio signals; and
a monitoring system configured to monitor a position of a listener's head relative to a reference listening position; wherein:
each of the acoustic audio signals is transferred according to a transfer matrix from each of the groups of loudspeakers to each of the sound zones to contribute to the reception sound signals,
processing of the electrical audio signals comprises filtering that is configured to compensate for the transfer matrix so that each of the reception sound signals corresponds to one of the electrical audio signals, and
filter characteristics of the filtering are adjusted based on an identified listening position of the listener's head,
where the monitoring system is a visual monitoring system configured to visually monitor the position of the listener's head relative to the reference listening position,
where the monitoring system includes:
a first camera positioned above of the listener's head to monitor the position of the listener's head along a first direction, and
a second camera positioned in front of the listener's head to monitor the position of the listener's head along a second direction, and
where first direction is perpendicular to the second direction.