US 11,678,116 B1
Optimization of a hybrid active noise cancellation system
Fotios Kontomichos, Patras (GR); Wessel Harm Lubberhuizen, Delden (NL); Paul Shields, Dunblane (GB); and Georgios Flamis, Patras (GR)
Assigned to Dialog Semiconductor B.V., 's-Hertogenbosch (NL)
Filed by Dialog Semiconductor B.V., s-Hertogenbosch (NL)
Filed on May 28, 2021, as Appl. No. 17/334,167.
Int. Cl. H04R 3/00 (2006.01); G10K 11/178 (2006.01); H04R 3/02 (2006.01)
CPC H04R 3/02 (2013.01) [G10K 11/178 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A computer-implemented method for automatically optimizing a hybrid active noise cancellation system, the hybrid active noise cancellation system comprising a feedback filter and a feedforward filter, the method comprising:
optimizing the feedback filter prior to optimizing the feedforward filter, wherein optimizing the feedback filter comprises:
i) estimating a second frequency response of an adaptive noise cancellation system at a user's ear, the second frequency response being due to the feedback filter;
ii) determining an adjustment to be applied to a feedback filter transfer function based on the second frequency response; and
iii) adjusting the feedback filter transfer function; and optimizing the feedforward filter, thereby optimizing the hybrid active noise cancellation system, wherein optimization of the feedforward filter is dependent on the feedback filter.