A method for reducing noise associated with an audio signal received
through a microphone sensor array is provided. The method initiates with
enhancing a target signal component of the audio signal through a first
filter. Simultaneously, the target signal component is blocked by a
second filter. Then, the output of the first filter and the output of the
second filter are combined in a manner to reduce noise without distorting
the target signal. Next, an acoustic set-up associated with the audio
signal is periodically monitored. Then, a value of the first filter and a
value of the second filter are both calibrated based upon the acoustic
set-up. A system capable of isolating a target audio signal from multiple
noise sources, a video game controller, and an integrated circuit
configured to isolate a target audio signal are included.