US 12,387,739 B2
Loudspeaker system provided with dynamic speech equalization
Anders Røser Hansen, Ballerup (DK); Poul Peder Hestbek, Ballerup (DK); Svend Feldt, Ballerup (DK); and Casper Fynsk, Ballerup (DK)
Assigned to EPOS GROUP A/S, Ballerup (DK)
Filed by EPOS Group A/S, Ballerup (DK)
Filed on Feb. 8, 2023, as Appl. No. 18/107,195.
Application 18/107,195 is a continuation of application No. 17/380,742, filed on Jul. 20, 2021, granted, now 11,600,285.
Claims priority of application No. 20186923 (EP), filed on Jul. 21, 2020.
Prior Publication US 2023/0186931 A1, Jun. 15, 2023
Int. Cl. G10L 21/0208 (2013.01); H04R 3/00 (2006.01); H04R 3/04 (2006.01); H04R 3/12 (2006.01); H04R 5/04 (2006.01); H04S 1/00 (2006.01); H04S 7/00 (2006.01)
CPC G10L 21/0208 (2013.01) [H04R 3/005 (2013.01); H04R 3/04 (2013.01); H04R 3/12 (2013.01); H04R 5/04 (2013.01); H04S 1/002 (2013.01); H04S 7/307 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method for dynamic speech equalization, comprising:
receiving an input audio signal;
analyzing a characteristic of an input sample of the input audio signal relative to speech by applying two analysis filters in parallel to the input audio signal, and measuring an energy level of the output of each of the two filters, the two analysis filters having different frequency ranges, wherein one of the two analysis filters is a high pass filter with a cut-off frequency in the range of 1500 to 2500 Hz, and the other of the two analysis filters is a low pass filter with a cut-off frequency in the range of 400 to 600 Hz;
utilizing at least one actuator filter, which receives the input audio signal in parallel with the two analysis filters, to apply a frequency adjustment on the same input sample of the input audio signal whose characteristic is being analyzed by application of the two analysis filters to produce an equalized electric audio signal, the frequency adjustment being dependent on the analyzed characteristic; and
transmitting an output signal perceivable by a user as sound representative of said equalized audio signal or a processed version thereof.