US 12,418,748 B2
Apparatus and method for automatic adaption of a loudspeaker to a listening environment
Andreas Walther, Erlangen (DE); Albert Prinn, Erlangen (DE); and Cagdas Tuna, Erlangen (DE)
Assigned to Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Munich (DE)
Filed by Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Munich (DE)
Filed on Oct. 6, 2022, as Appl. No. 17/961,329.
Application 17/961,329 is a continuation of application No. PCT/EP2021/058770, filed on Apr. 1, 2021.
Prior Publication US 2023/0093185 A1, Mar. 23, 2023
Int. Cl. H04R 3/08 (2006.01); H04R 29/00 (2006.01)
CPC H04R 3/08 (2013.01) [H04R 29/001 (2013.01)] 73 Claims
OG exemplary drawing
 
1. An apparatus for processing an audio input signal comprising one or more audio input channels to acquire an audio output signal comprising one or more audio output channels, wherein the apparatus comprises:
an estimation unit configured to estimate a radiation resistance of each driver of one or more drivers of each loudspeaker of one or more loudspeakers as an estimated radiation resistance; or configured to estimate a radiation impedance of each driver of the one or more drivers of each loudspeaker of the one or more loudspeakers as an estimated radiation impedance, wherein said estimated radiation impedance of said driver comprises estimated information on the radiation resistance of said driver, and
a processing unit configured to acquire the one or more audio output channels by processing each audio input channel of the one or more audio input channels depending on the estimated radiation resistance or depending on the estimated radiation impedance of each of the one or more drivers of each of the one or more loudspeakers,
wherein to estimate the estimated radiation resistance or the estimated radiation impedance of each driver of the one or more drivers of each loudspeaker of the one or more loudspeakers, the estimation unit is configured to estimate the estimated radiation resistance or the estimated radiation impedance using at least one of estimated sound pressure information and estimated velocity information, wherein the estimated sound pressure information indicates an estimation of sound pressure at said driver of said loudspeaker instead of a measurement of the sound pressure directly at said driver, and wherein the estimated velocity information indicates an estimation of a driver velocity of said driver of said loudspeaker instead of a measurement of the driver velocity directly at said driver.