Electronic stethoscope
First Claim
1. An electronic digital stethoscope comprising a vibration transducer, an amplifier, a headphone arrangement, and a digital filter means which establishes at least one impulse transfer function corresponding to at least one acoustic stethoscope type;
- and wherein in the signal path before the filtering, there is performed a pre-emphasis of the high frequencies in dependence of the thickness of tissue which is present between an actual sound source and the transducer.
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Accused Products
Abstract
An electronic stethoscope consisting of a transducer, an amplifier and a headphone will be better adapted to the habits of use of doctors when it is supplied with filters which mimic the transfer function of acoustic stethoscopes. Thus, the signals heard will correspond to those learnt, and thereby the advantages of greater amplification and elimination of noise sources may be fully utilized. Hence there is a possibility for extended digital signal processing which may furthermore compensate for the hearing loss of each individual doctor.
31 Citations
15 Claims
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1. An electronic digital stethoscope comprising a vibration transducer, an amplifier, a headphone arrangement, and a digital filter means which establishes at least one impulse transfer function corresponding to at least one acoustic stethoscope type;
- and wherein in the signal path before the filtering, there is performed a pre-emphasis of the high frequencies in dependence of the thickness of tissue which is present between an actual sound source and the transducer.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
Specification