1. A method performed by an information handling system for acoustic echo cancellation, the method comprising: in response to a first signal, outputting a first sound wave; receiving a second sound wave that includes an acoustic echo of the first sound wave; computing an estimate of the acoustic echo; in response to the second sound wave, outputting a second signal that represents the second sound wave minus the estimate of the acoustic echo; and iteratively adapting the estimate of the acoustic echo to increase a statistical independence between the first signal and the second signal in a frequency domain based on second-order statistics without higher-order statistics, irrespective of whether a first voice is present in the first sound wave, and irrespective of whether a second voice is present in the second sound wave.