Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Acoustic – nonairborne vibration sensing or counterwave emission
Patent
1996-06-13
1997-11-25
Kuntz, Curtis
Electrical audio signal processing systems and devices
Acoustical noise or sound cancellation
Acoustic, nonairborne vibration sensing or counterwave emission
381 72, A61F 1106
Patent
active
056920563
ABSTRACT:
A method and apparatus for active cancellation of vibrational noise produced by a medical instrument in the head of a patient. Vibrations from the instrument, as well as vibrations in the bone structure in the head of the patient, are sensed and processed to generate cancelling noise waves which are then fed into the inner ear through vibrators placed on the head of the patient. An equalizer shapes the magnitude and phase spectrum of the vibrational signal picked up from the drill and delivers the equalized vibrational signals to the patient. An automatic adaptive controller adjusts the equalizer using control signals consisting of vibrations from the bone structure and the drill.
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Kuntz Curtis
Lee Ping W.
O'Banion John P.
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