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Stethoscope with digital frequency translation for improved audibility
The performance of an acoustic stethoscope is improved by translating, without loss of fidelity, heart sounds, chest sounds, and intestinal sounds below 50 Hz into a frequency range of 200 Hz, which is easily detectable by the human ear. Such a frequency translation will be of significant benefit to...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Institution of Engineering and Technology
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6863143/ https://www.ncbi.nlm.nih.gov/pubmed/31839970 http://dx.doi.org/10.1049/htl.2019.0011 |
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author | Aumann, Herbert M. Emanetoglu, Nuri W. |
author_facet | Aumann, Herbert M. Emanetoglu, Nuri W. |
author_sort | Aumann, Herbert M. |
collection | PubMed |
description | The performance of an acoustic stethoscope is improved by translating, without loss of fidelity, heart sounds, chest sounds, and intestinal sounds below 50 Hz into a frequency range of 200 Hz, which is easily detectable by the human ear. Such a frequency translation will be of significant benefit to hearing impaired physicians and it will improve the stethoscope performance in a noisy environment. The technique is based on a single sideband suppressed carrier modulation. Stability and bias problems commonly associated with an analog frequency translator are avoided by an all-digital implementation. Real-time audio processing is made possible by approximating a Hilbert transformer with a time delay. The performance of the digital frequency translator was verified with a 16-bit 44.1 Ks/s audio coder/decoder and a 32-bit 72 MHz microcontroller. |
format | Online Article Text |
id | pubmed-6863143 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | The Institution of Engineering and Technology |
record_format | MEDLINE/PubMed |
spelling | pubmed-68631432019-12-13 Stethoscope with digital frequency translation for improved audibility Aumann, Herbert M. Emanetoglu, Nuri W. Healthc Technol Lett Article The performance of an acoustic stethoscope is improved by translating, without loss of fidelity, heart sounds, chest sounds, and intestinal sounds below 50 Hz into a frequency range of 200 Hz, which is easily detectable by the human ear. Such a frequency translation will be of significant benefit to hearing impaired physicians and it will improve the stethoscope performance in a noisy environment. The technique is based on a single sideband suppressed carrier modulation. Stability and bias problems commonly associated with an analog frequency translator are avoided by an all-digital implementation. Real-time audio processing is made possible by approximating a Hilbert transformer with a time delay. The performance of the digital frequency translator was verified with a 16-bit 44.1 Ks/s audio coder/decoder and a 32-bit 72 MHz microcontroller. The Institution of Engineering and Technology 2019-07-31 /pmc/articles/PMC6863143/ /pubmed/31839970 http://dx.doi.org/10.1049/htl.2019.0011 Text en http://creativecommons.org/licenses/by-nc-nd/3.0/ This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/) |
spellingShingle | Article Aumann, Herbert M. Emanetoglu, Nuri W. Stethoscope with digital frequency translation for improved audibility |
title | Stethoscope with digital frequency translation for improved audibility |
title_full | Stethoscope with digital frequency translation for improved audibility |
title_fullStr | Stethoscope with digital frequency translation for improved audibility |
title_full_unstemmed | Stethoscope with digital frequency translation for improved audibility |
title_short | Stethoscope with digital frequency translation for improved audibility |
title_sort | stethoscope with digital frequency translation for improved audibility |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6863143/ https://www.ncbi.nlm.nih.gov/pubmed/31839970 http://dx.doi.org/10.1049/htl.2019.0011 |
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