Abstract:
This paper reports on the implementation of a multi-channel electronic stethoscope designed to isolate the heart sound from the interfering sounds of the lungs and blood ...Show MoreMetadata
Abstract:
This paper reports on the implementation of a multi-channel electronic stethoscope designed to isolate the heart sound from the interfering sounds of the lungs and blood vessels. The multi-channel stethoscope comprises four piezo contact microphones arranged in rectangular and linear arrays. Beamforming and channel equalisation techniques are applied to the multi-channel recordings made in the aortic, pulmonary, tricuspid, and mitral valve areas. The proposed channel equaliser cancels out the distorting effect of the chest and rib cage on the heart sound frequency spectrum. It is shown that the applied beamforming methods effectively suppress the interfering lung noise and improve the signal to interference and noise ratio by 16 dB. The results confirm the superior performance of the implemented multi-channel stethoscope compared with commercially available single-channel electronic stethoscopes.
Date of Conference: 18-21 January 2021
Date Added to IEEE Xplore: 18 December 2020
ISBN Information:
ISSN Information:
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- IEEE Keywords
- Index Terms
- Stethoscope ,
- Heart Sound ,
- Frequency Spectrum ,
- Aortic Valve ,
- Linear Array ,
- Mitral Valve ,
- Tricuspid ,
- Rib Cage ,
- Rectangular Array ,
- Interference Ratio ,
- Beamforming Method ,
- Channel Equalization ,
- Low-pass ,
- Muscle Tissue ,
- Separation Method ,
- Heart Valve ,
- Azimuth Angle ,
- Heart And Lung ,
- Speed Of Sound ,
- Direction Of Arrival ,
- Microphone Array ,
- Angle Of Arrival ,
- Breath Sounds ,
- Chirp Signal ,
- Array Geometry ,
- Types Of Transducers ,
- Sound Source ,
- Time Difference Of Arrival ,
- Acoustic Response
- Author Keywords
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Stethoscope ,
- Heart Sound ,
- Frequency Spectrum ,
- Aortic Valve ,
- Linear Array ,
- Mitral Valve ,
- Tricuspid ,
- Rib Cage ,
- Rectangular Array ,
- Interference Ratio ,
- Beamforming Method ,
- Channel Equalization ,
- Low-pass ,
- Muscle Tissue ,
- Separation Method ,
- Heart Valve ,
- Azimuth Angle ,
- Heart And Lung ,
- Speed Of Sound ,
- Direction Of Arrival ,
- Microphone Array ,
- Angle Of Arrival ,
- Breath Sounds ,
- Chirp Signal ,
- Array Geometry ,
- Types Of Transducers ,
- Sound Source ,
- Time Difference Of Arrival ,
- Acoustic Response
- Author Keywords