alexa Unidirectional Microphone based Wireless Recorder for the Respiration Sound | OMICS International | Abstract
ISSN: 2155-9538

Journal of Bioengineering & Biomedical Science
Open Access

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Research Article

Unidirectional Microphone based Wireless Recorder for the Respiration Sound

Bing-Yuh Lu1,2*

1Department of Electronic Engineering, Tungnan University, Taiwan, ROC

2Department of Business Administration, National Taipei University of Business, Taipei, Taiwan, ROC

*Corresponding Author:
Bing-Yuh Lu
Department of Electronic Engineering
Tungnan University and Department of Business Administration
National Taipei University, Taipei, Taiwan, ROC
Tel: 88686625912
Fax: 886226629592
E-mail: [email protected]

Received date: June 18, 2016; Accepted date: July 13, 2016; Published date: July 20, 2016

Citation: Lu BY (2016) Unidirectional Microphone based Wireless Recorder for the Respiration Sound. J Bioengineer & Biomedical Sci 6:195. doi:10.4172/2155-9538.1000195

Copyright: © 2016 Lu BY. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

The wireless recorder for heart and lung sounds is intuitively convenient to the medical doctors and the patients for its portability which makes the auscultation be possible in a certain range. Such a recorder facilitates increased patient movement (postures and exercises) during diagnosis. Therefore, a wireless communication system for lung sound recording has been developed in this study. Two unidirectional microphones (SM35 and Beta 98H/C, Shure), a wireless body pack transmitter (PGXD1, Shure), and a wireless receiver (PGXD4, Shure) were used in our recording system. The detected sound was transmitted to a mixing console (MG06, Yamaha) for amplification. The system characteristics are as follows: (1) offers excellent low-frequency response, (2) has unidirectional microphone sensing, (3) blocks noise from the environment, (4) records sounds of moving and exercising people, and (5) records other physiological sounds. All of SNREN>35 in tests under the environmental noises in the range of 25 to 40 dB encouraged us to neglect the influences of the environmental noise. The findings strongly recommend that the proposed recording system be adopted by groups researching lung sounds because it reduces the number of complex devices and algorithms necessary for noise reduction, offers a high SNR, and facilitates device use in various environments. Furthermore, the developed system can be used to record lung sounds because of its excellent low-frequency response, especially, using the instrumentation microphone.

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