Acoustic detection for respiratory treatment apparatus
AssigneeResMed Pty Ltd
InventorsLiam Holley, Dion Charles Chewe Martin, Steven Paul Farrugia
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Abstract
Methods and apparatus provide acoustic detection for automated devices such as respiratory treatment apparatus. In some embodiments of the technology, acoustic analysis of noise or sound pulses, such as a cepstrum analysis, based on signals of a sound sensor permits detection of obstruction such as within a patient interface, mask or respiratory conduit or within patient respiratory system. Some embodiments further permit detection of accessories such as an identification thereof or a condition of use thereof, such as a leak. Still further embodiments of the technology permit the detection of a patient or user who is intended to use the automated device.
Claims12
A method for authenticating a user of a device comprising:
- determining with a sound sensor a measure of sound of a sound generator within a sound conduit directed to an anatomical cavity of a user of a device;
- and
- analyzing the measure of sound from the sound sensor with a processor by calculation of a cepstrum from the measure of sound;
- and
- determining with the processor that the user is a pre-authorized user based on the analyzing.
An apparatus for authenticating a user comprising:
- a sound conduit adapted to direct an acoustic signal to an anatomical cavity of a user of the apparatus;
- a sound generator to generate the acoustic signal;
- a microphone adapted for coupling with the sound conduit to generate a measure of the acoustic signal;
- and
- a processor configured to analyze data samples of the measure of the acoustic signal from the microphone by calculation of a cepstrum with the data samples of the measure of sound, the processor being further configured to determine that the user is a pre-authorized user based on the analysis.
Dependencies are inferred from the claim text.