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Microphone aided vibrator tuning

  • US 7,123,948 B2
  • Filed: 07/16/2002
  • Issued: 10/17/2006
  • Est. Priority Date: 07/16/2002
  • Status: Expired due to Fees
First Claim
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1. A method of tuning an alert device in a portable communication apparatus including a microphone, comprising the steps of:

  • recording, through the microphone, an acoustic signal which is emitted by the alert device in response to a drive signal;

    deriving a characteristic value of the recorded signal;

    comparing the characteristic value with a reference value and generating a comparison result; and

    controlling the drive signal of the alert device in response to the comparison result.

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