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oa A Simple Laptop-based Phonocardiography System: A Novel and Inexpensive Instrument for Research and Clinical Use
- Source: New Emirates Medical Journal, Volume 2, Issue 1, Jan 2021, p. 31 - 37
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- 15 Jan 2020
- 28 Apr 2020
- 11 May 2020
Abstract
Background: Cardiac auscultation is a frequent first step in diagnosing heart disorders. However, the lack of dependability of ordinary auscultation in the hands of inexperienced clinicians remains a problem.
Objectives: We sought to develop an inexpensive system for digital cardiac auscultation (digital phonocardiography) using a Windows laptop computer, freely downloadable software and an inexpensive USB microphone.
Description: The system, based on the free open-source Audacity software package, offers advanced features such as phonocardiogram storage and retrieval, low-pass and high-pass waveform filtering and variable-speed signal playback with pitch preservation.
Results: Sample results for both raw and digitally filtered phonocardiograms are provided.
Conclusion: An innovative laptop-based phonocardiogram system offering advanced features can be easily produced at minimal cost.