Automatic adjustments of audio alert characteristics of an...

Electrical audio signal processing systems and devices – Monitoring of sound – Amplification control responsive to ambient sound

Reexamination Certificate

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Details

C381S107000, C379S373010, C379S375010

Reexamination Certificate

active

07636444

ABSTRACT:
The automatic adjustment of audio alert characteristics of an alert device using ambient noise levels is described. In one aspect of the invention, a machine-readable medium has executable instructions to cause a machine to perform a method to receive an audio sample of ambient noise and adjust a characteristic of the audio alert, such as, the volume level of the audio alert, based on the ambient noise level.

REFERENCES:
patent: 5757937 (1998-05-01), Itoh et al.
patent: 5844983 (1998-12-01), Lilja
patent: 5963639 (1999-10-01), Kanamaki
patent: 5991420 (1999-11-01), Stern
patent: 6246761 (2001-06-01), Cuddy
patent: 6360187 (2002-03-01), Hermann
patent: 0959608 (1999-11-01), None
patent: 2331429 (1999-05-01), None
patent: WO-99/03259 (1999-01-01), None
patent: WO-99/05850 (1999-02-01), None

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