REVIEW ARTICLE
Acoustical Respiratory Monitoring in the Time Domain
D. John Doyle1, *
Article Information
Identifiers and Pagination:
Year: 2019Volume: 13
First Page: 144
Last Page: 151
Publisher ID: TOATJ-13-144
DOI: 10.2174/2589645801913010144
Article History:
Received Date: 19/09/2019Revision Received Date: 02/10/2019
Acceptance Date: 09/11/2019
Electronic publication date: 17/12/2019
Collection year: 2019
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Abstract
This paper introduces the reader to some of the various methods that are available for the time-domain bio-acoustical monitoring of patient breathing. Technical details concerning microphone selection, calibration and characterization, signal amplification, signal filtering and waveform recording are presented. We also describe proof of concept recordings obtained from the neck, from the external ear canal, from a microphone embedded into an oxygen mask and from a leak-free microphone pneumatically connected to the cuff of a laryngeal mask airway. We recommend Audacity, an open-source digital audio editor and recording package that can be freely downloaded at https://www.audacityteam.org for investigators seeking to conduct research on breath sound analysis.