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External ambient noise monitoring to adapt control of internal system noise sources

  • US 7,983,770 B2
  • Filed: 04/30/2007
  • Issued: 07/19/2011
  • Est. Priority Date: 04/30/2007
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a CPU;

    a system memory in communication with said CPU;

    a fan;

    an ambient noise measurement input which provides an ambient noise measurement; and

    a control module configured to;

    determine a corrected external noise value corresponding to an ambient noise measurement having contribution of internal system components removed by using a value obtained from a table storing a plurality of noise profile measurements corresponding to calibrated system noise values, the calibrated system noise values representing internal system noise as a function of one or more of fan speed and CPU throttling; and

    control fan speed and CPU throttling responsive to said ambient noise measurement input;

    wherein said control module acts to prompt said fan to generate less noise if a noise profile measurement for a current fan speed is greater than the corrected external noise measurement.

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