A Robust multichannel lung sound recording device

Elmar Messner, Martin Hagmüller, Paul Swatek, Franz Pernkopf

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents a robust multichannel lung sound recording device (LSRD) for automatic lung sound classification. Compared to common approaches, we improved the usability and the robustness against body sounds and ambient noise. We developed a novel lung sound transducer (LST) and an appropriate attachment method realized as a foam pad. For analogue prefiltering, preamplification, and digitization of the lung sound signal, we use a composition of low-cost standard audio recording equipment. Furthermore, we developed a suitable recording software. In our experiments, we show the robustness of our LSRD against ambient noise, and we demonstrate the achieved signal quality. The LST's microphone features a signal-to-noise ratio of SNR = 80 dB. Therefore, we obtain a bandwidth of up to a frequency of f 2500 Hz for vesicular lung sound recordings. Compared to the attachment of the LST with self-adhesive tape, the foam pad achieves an attenuation of ambient noise of up to 50 dB in the relevant frequency range. The result of this work is a multichannel recording device, which enables a fast gathering of valuable lung sounds in noisy clinical environments without impeding the daily routines.

Original languageEnglish
Title of host publicationBIODEVICES 2016 - 9th International Conference on Biomedical Electronics and Devices, Proceedings; Part of 9th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2016
PublisherSciTePress
Pages34-39
Number of pages6
ISBN (Electronic)9789897581700
Publication statusPublished - 2016
Event9th International Conference on Biomedical Electronics and Devices, BIODEVICES 2016 - Part of 9th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2016 - Rome, Italy
Duration: 21 Feb 201623 Feb 2016

Conference

Conference9th International Conference on Biomedical Electronics and Devices, BIODEVICES 2016 - Part of 9th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2016
CountryItaly
CityRome
Period21/02/1623/02/16

Keywords

  • Air-coupled microphone
  • Lung sound transducer
  • Lung sounds
  • Multichannel recording device
  • Sound classification

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Biomedical Engineering

Fields of Expertise

  • Human- & Biotechnology

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