Physiological condition monitors utilizing very low frequency acoustic signals
First Claim
1. An apparatus for detecting very low frequency acoustic signals and signals indicative of body orientation comprising:
- a low frequency sensor capable of being acoustically coupled to a source of low frequency acoustic signals, said low frequency sensor capable of receiving low frequency acoustic signals in the frequency range of one tenth Hertz to thirty Hertz and generating electronic signals indicative of the intensity of said low frequency acoustic signals; and
an apparatus capable of evaluating movement of a body relative to an environment of the type comprising;
a sensor, associable with said body, that senses dynamic and static accelerative phenomena of said body; and
a processor, associated with said sensor, that processes said sensed dynamic and static accelerative phenomena as a function of at least one accelerative event characteristic to thereby determine whether said evaluated body movement is within environmental tolerance.
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Abstract
Physiological condition monitors utilizing very low frequency acoustic signals and signals indicative of body orientation are disclosed. The physiological condition monitors comprise a sensor that is capable of detecting low frequency acoustic signals in the frequency range of one tenth Hertz to thirty Hertz. The sensor comprises a chamber having portions that form a cavity and a low frequency microphone placed within the cavity. An alternate embodiment of the invention comprises a chamber having portions that form a resonant cavity, a microphone mounted in the resonant cavity, and a membrane that covers the resonant cavity. Low frequency acoustic signals that are incident on the membrane cause the membrane to move and amplify the acoustic signals within the resonant cavity. The sensor provides information concerning physiological conditions, such as respiration and cardiac activity. The sensor in a physiological condition monitor does not need to be directly coupled to the skin of the person being monitored. The physiological condition monitor simultaneously provides information concerning cardiac activity, and respiration activity, and the movement and position orientation of the monitored person'"'"'s body.
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Citations
20 Claims
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1. An apparatus for detecting very low frequency acoustic signals and signals indicative of body orientation comprising:
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a low frequency sensor capable of being acoustically coupled to a source of low frequency acoustic signals, said low frequency sensor capable of receiving low frequency acoustic signals in the frequency range of one tenth Hertz to thirty Hertz and generating electronic signals indicative of the intensity of said low frequency acoustic signals; and
an apparatus capable of evaluating movement of a body relative to an environment of the type comprising;
a sensor, associable with said body, that senses dynamic and static accelerative phenomena of said body; and
a processor, associated with said sensor, that processes said sensed dynamic and static accelerative phenomena as a function of at least one accelerative event characteristic to thereby determine whether said evaluated body movement is within environmental tolerance. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A physiological condition monitor for detecting very low frequency acoustic signals of a person and signals indicative of a person'"'"'s body orientation comprising:
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a low frequency sensor capable of being acoustically coupled to the body of the person being monitored and capable of receiving low frequency acoustic signals in the range of one tenth Hertz to thirty Hertz and capable of generating electronic signals indicative of the intensity of said low frequency acoustic signals; and
a low bandpass filter coupled to said sensor capable of processing said electronic signals from said low frequency sensor to obtain digitally encoded electronic signals indicative of the intensity of said low frequency acoustic signals in the frequency range of one tenth Hertz to two Hertz, said digitally encoded electronic signals being indicative of respiration activity of the person being monitored; and
an apparatus capable of evaluating movement of a person'"'"'s body relative to an environment of the type comprising;
a sensor, associable with said body, that senses dynamic and static accelerative phenomena of said body; and
a processor, associated with said sensor, that processes said sensed dynamic and static accelerative phenomena as a function of at least one accelerative event characteristic to thereby determine whether said evaluated body movement is within environmental tolerance. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for detecting very low frequency acoustic signals and signals indicative of body orientation comprising the steps of:
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acoustically coupling a low frequency sensor to a source of low frequency acoustic signals;
receiving in said low frequency sensor acoustic signals in the range of one tenth Hertz to thirty Hertz;
generating in said low frequency sensor electronic signals indicative of the intensity of said low frequency acoustic signals; and
processing repeatedly sensed dynamic and static accelerative phenomena of a body as a function of at least one accelerative event characteristic to thereby determine whether said evaluated body movement is within environmental tolerance. - View Dependent Claims (19, 20)
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Specification