Breath Sounds pp 119-137 | Cite as

Breath Sound Recording

  • Yasemin P. Kahya


Auscultation of the lung dates back more than 2000 years, but it has become a diagnostic tool since Laennec introduced the first form of the stethoscope [1]. The stethoscope is a widely used instrument to the extent that it has become the symbol of medical profession. Nevertheless, auscultation with a traditional stethoscope, which amplifies frequencies lower than 112 Hz and attenuates those higher than 112 Hz [2], is regarded to have low diagnostic value due to the attenuation of higher frequencies, which contain valuable diagnostic information regarding respiratory sounds, and due to the subjectivity involved in the evaluation of these sounds by medical doctors. With the advances in computer technology and signal processing algorithms, computerized analysis of respiratory sounds has provided new understanding in correlating lung sounds with diseases and disease states [3] and, also, in relating pulmonary acoustics with lung mechanics. Computational methods for the analysis of breath sounds offer additional advantages, such as digital storage, monitoring in critical settings, computer-supported analysis, comparison among different recordings, and provision of objective parameters in their evaluation. Despite this aroused research activity in breath sound processing and analysis, the main concern is in the standardization of the recording of breath sounds. Different approaches to record breath sounds have been reported in various publications, such as in [4–7]. Moreover, there have been efforts to offer guidelines for data acquisition equipment, such as the Computerized Respiratory Sound Analysis (CORSA) project financed by the European Community [8]; such efforts will eventually culminate in the commercial development of respiratory sound acquisition equipment, which will be accepted with general consensus by the medical community.


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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Electrical and Electronic Engineering DepartmentBogazici UniversityIstanbulTurkey

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