Patent ID: 7751915

Claim:
Wave field synthesis system comprising: a wave field synthesis module connectable to an array of loudspeakers for providing sound to a presentation region, the wave field synthesis module being formed to receive a plurality of audio signals for a plurality of virtual sound sources, each audio signal being associated to a virtual sound source, receive source positional information for each virtual sound source, calculate scaling values and delay values for each virtual sound source and for each loudspeaker considering the source positional information for each virtual source and the loudspeaker positional information of the loudspeakers in the array of loudspeakers by using a wave field synthesis algorithm, calculate component signals for the loudspeakers due to each virtual sound source, by applying the calculated scaling values and the calculated delay values to the audio signals of the virtual sound sources, and add, for each loudspeaker in the array of loudspeakers, the component signals for this loudspeaker from each one of the plurality of virtual sound sources, so that a loudspeaker signal for each loudspeaker is obtained to which the plurality of virtual sound sources contribute, and a device for level correction of the audio signals of the virtual sound sources before being input into the wave field synthesis module or for level correction of the component signals for the loudspeakers due to each virtual sound source before being added in the wave field synthesis module, the device for level correction comprising: a determiner for determining, for each virtual sound source of the plurality of virtual sound sources, a correction value which is based on a set amplitude state in the presentation region, the set amplitude state depending on a position of this virtual sound source or a type of this virtual sound source, and which is also based on an actual amplitude state in the presentation region which is based on the component signals for the loudspeakers due to this virtual sound source as determined by the calculated scaling values and the calculated delay values, whereby the determiner determines a plurality of individual correction values, each correction value being associated with one virtual sound source; and a manipulator for multiplying, for each virtual sound source of the plurality of virtual sound sources, the audio signal associated to the virtual sound source by the correction value associated with this virtual sound source before inputting the audio signal for this virtual sound source into the wave field synthesis module or for multiplying the component signals for this virtual sound source by the correction value associated with this virtual sound source before being added to component signals derived from a different virtual sound source in the wave field synthesis module, whereby a deviation between the set amplitude state and the actual amplitude state for each virtual sound source of the plurality of virtual sound sources is reduced.