Patent ID: 9191743
Filing Date: 2015-11-17
Classification: H04R

Abstract:
1. An apparatus for processing an audio signal to focus an acoustic signal by an arrangement of a plurality of loudspeakers, wherein the acoustic signal is based on the audio signal, comprising: a low-pass filter configured to attenuate frequencies higher than a low-pass cut off frequency, wherein the low-pass cut off frequency is based on a geometry parameter of the arrangement of the plurality of loudspeakers; wherein the plurality of loudspeakers is arranged in a line and the geometry parameter is equal to the distance of both outermost loudspeakers, or wherein the plurality of loudspeakers is arranged circular and the geometry parameter is equal to the diameter of the circular arrangement, a frequency analyzer configured to determine a fundamental frequency in a frequency spectrum of the audio signal depending on the geometry parameter of the arrangement of the plurality of loudspeakers; an overtone generator configured to generate an overtone of the fundamental frequency; a signal processor configured to adapt the overtone of the fundamental frequency to obtain the processed audio signal; and a signal output interface configured to output the processed audio signal to the plurality of loudspeakers.