Patent ID: 7567677
Filing Date: 2009-07-28
Classification: G06F

Abstract:
1. A personal computer comprising: a housing; a microphone built into the housing to detect noise ambient to the housing; a processor integrated into the housing, the microphone being coupled to the processor; a noise cancellation module operable on the processor, the noise cancellation module generating a noise cancellation signal responsive to the ambient noise detected by the microphone; and a digital signal processor coupled to the noise cancellation module and configured to mix the noise cancellation signal with an audio signal provided from a desired source to output a mixed signal, the digital signal processor being connected to a standard headphone compatible audio output connection integrated on the housing such that the mixed signal is available at the audio output connection; wherein the mixed signal reproduced by headphones connected to the audio output connection reduces noise perceived by a user wearing the headphones and listening to the mixed signal through the headphones; wherein the noise cancellation module applies a key click profile to the ambient noise detected by the microphone to compensate for a keyboard noise level detected by the microphone in the noise cancellation signal.