Electrical audio signal processing systems and devices – Monitoring of sound
Reexamination Certificate
2006-02-13
2011-12-13
Chin, Vivian (Department: 2614)
Electrical audio signal processing systems and devices
Monitoring of sound
C381S055000, C381S072000, C381S074000
Reexamination Certificate
active
08077872
ABSTRACT:
A visual feedback system that activates a visual display when the sound pressure level from a headset attached to the system exceeds a preset level is provided, along with a method of using the same. The visual feedback system is interposed between the audio source and the headset and is either integral to a specific headset or coupleable to any of a variety of headsets. If a non-integral headset is used with the visual feedback system, the system is matched to the characteristics of the selected headset, for example using a selector switch or via a calibration process. During operation, the visual feedback system illuminates a display (e.g., an LED) whenever the sound pressure level from the attached headset exceeds the preset level. The visual feedback system can be implemented using analog or digital circuitry.
REFERENCES:
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patent: 4143245 (1979-03-01), Scholz
patent: 5134659 (1992-07-01), Moseley
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patent: 2003/0002688 (2003-01-01), Kanevsky et al.
patent: 2004/0190729 (2004-09-01), Yonovitz et al.
Allison Robert G.
Dyer Medford Alan
Harvey Jerry J.
Chin Vivian
Logitech International, S.A.
Patent Law Office of David G. Beck
Suthers Douglas
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