Patent ID: 8543390

Claim:
A signal enhancement system having an audio source device configured to generate a plurality of input signals from a common source, the system comprising: a plurality of periodic signal enhancement circuits implemented in hardware or executed by a processor, each periodic signal enhancement circuit comprising an adaptive filter and each periodic signal enhancement circuit configured to: receive the respective input signal; add a first periodic signal component in the input signal with a second periodic signal component in an output of the adaptive filter to increase the first periodic signal component in the input signal, the second periodic signal component being at least partially in-phase with the first periodic signal component; and generate an enhanced output signal, the enhanced output signal comprising the increased first periodic signal component; a plurality of alignment circuits, each configured to receive the respective enhanced output signal and a common reference signal; the respective alignment circuit time-aligning each enhanced output signal with the common reference signal to generate a time-aligned output signal; and a summing circuit configured to: add the respective time-aligned output signals and the common reference signal to generate an enhanced time-aligned output signal; and output the enhanced time-aligned output signal.