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Method and apparatus for controlling a telephone ring signal

  • US 5,844,983 A
  • Filed: 07/10/1997
  • Issued: 12/01/1998
  • Est. Priority Date: 07/10/1997
  • Status: Expired due to Term
First Claim
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1. Apparatus for controlling a notification signal produced by an electronic device, comprising:

  • means for generating a noise signal indicative of an ambient noise level, said noise signal having a characteristic power spectrum;

    processing means for receiving the noise signal and analyzing the power spectrum of the noise signal;

    a transducer for generating a notification signal; and

    control means, coupled to said processing means and said transducer, for selecting a notification signal frequency in response to the power spectrum of the noise signal and causing said transducer to oscillate at said selected frequency.

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