Electrical audio signal processing systems and devices – Directive circuits for microphones
Patent
1996-10-10
1998-12-01
Isen, Forester W.
Electrical audio signal processing systems and devices
Directive circuits for microphones
381 67, 600529, 600528, H04R 300
Patent
active
058449973
ABSTRACT:
A system and method for localizing intrathoracic sounds in a patient. The system utilizes a plurality of microphones placed around the patient. The outputs of the microphones are amplified and filtered by a signal conditioner and converted into digital data streams. The digital data is then analyzed to determine the arrival of a subject at each microphone relative to the arrival time at the first microphone to sense the subject sound. Using equations of motion and the three-dimensional coordinates of the microphones, the system solves for the point of origin of the subject sounds and its speed.
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