System and method of detecting and processing physiological sounds
First Claim
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1. An assembly for detecting and processing physiological heart sounds, comprising:
- a sensor for sensing physiological heart sounds so as to acquire analog physiological signals;
an amplifier configured to amplify a first frequency range of said physiological signals to a first level and configured to amplify a second frequency range of said physiological signals to a second level, said second level being higher than said first level, the amplification of the signals in the second frequency range being substantially constant within the second frequency range, the amplification of the signals above the second frequency range declining with respect to frequency from the upper end of the second frequency range, said first frequency range of physiological signals including frequencies that correspond to basic heart sounds, said second frequency range of said physiological signals including frequencies that correspond to sounds of interest, the sounds of interest having frequencies that are higher than frequencies of the basic heart sounds; and
an analog to digital converter configured to sample the resulting amplified physiological signals in at least said second frequency range and convert the resulting sampled signals to digital signals.
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Abstract
A system and method for detecting and processing physiological sounds. The method includes sensing physiological sounds to acquire analog physiological signals, where the acquired analog physiological signals corresponding to basic heart sounds and sounds of interest. A predetermined frequency range of the acquired analog physiological signals that encompasses the sounds of interest are amplified, where at least a portion of the predetermined frequency range is higher than another frequency range of the acquired analog physiological signals that encompasses the basic heart sounds.
228 Citations
23 Claims
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1. An assembly for detecting and processing physiological heart sounds, comprising:
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a sensor for sensing physiological heart sounds so as to acquire analog physiological signals; an amplifier configured to amplify a first frequency range of said physiological signals to a first level and configured to amplify a second frequency range of said physiological signals to a second level, said second level being higher than said first level, the amplification of the signals in the second frequency range being substantially constant within the second frequency range, the amplification of the signals above the second frequency range declining with respect to frequency from the upper end of the second frequency range, said first frequency range of physiological signals including frequencies that correspond to basic heart sounds, said second frequency range of said physiological signals including frequencies that correspond to sounds of interest, the sounds of interest having frequencies that are higher than frequencies of the basic heart sounds; and an analog to digital converter configured to sample the resulting amplified physiological signals in at least said second frequency range and convert the resulting sampled signals to digital signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of detecting and processing physiological sounds, the method comprising:
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sensing the physiological sounds to acquire analog physiological signals, the sensed physiological sounds including basic heart sounds and sounds of interest; amplifying a first frequency range of the physiological signals to a first level; amplifying a second frequency range of the physiological signals to a second level that is higher than the first level, the amplification of the signals in the second frequency range being substantially constant within the second frequency range, the amplification of the signals above the second frequency range declining with respect to frequency from the upper end of the second frequency range, the second frequency range including frequencies that are higher than frequencies in the first frequency range, the second frequency range including frequencies of the sounds of interest; sampling the resulting amplified physiological signals in at least the second range; and converting the resulting sampled signals to digital signals. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification