Electrical audio signal processing systems and devices – Stethoscopes – electrical
Reexamination Certificate
2006-02-14
2006-02-14
Kuntz, Curtis (Department: 2643)
Electrical audio signal processing systems and devices
Stethoscopes, electrical
Reexamination Certificate
active
06999592
ABSTRACT:
A temporally and frequency controlled amplified cardiac stethoscope device is provided wherein frequency response selection is carried out by manually tuning two active filters thereby permitting user pass band (high and low frequency cutoff) selection. Simultaneously, the user is able to select a time window, or interval, of the audio output of the device for specific aural observation, to the exclusion of the remainder of cardiac cycle sounds. The device is miniaturized to permit transport in a clothing pocket and use in the clinic or at the bedside. The device is based upon electrocardiographic QRS complex/electronic Schmitt trigger synchronization of a sweep generator and comparator. The synchronization signal, in combination with manual user inputs, permits the control of digital/analog switching of on/off time intervals of a variable frequency response electronic stethoscope.
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Hunt, Jr. Ross F.
Jamal Alexander
Kuntz Curtis
Stites & Harbison PLLC
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