Belal Mohammed1

1 St. Petersburg Electrotechnical University LETI, (St. Petersburg, Russia)

1 Mbelal@stud.etu.ru

The use of digital technologies in the processing and analysis of breathing sounds can significantly improve the effectiveness of the diagnosis of lung diseases in the early stages of their development. Weak or pathological respiratory noises, small wheezing, crepitation can be successfully recognized using information technology analysis of the spectrum of breathing sounds. In this regard, the expansion of the functionality of digital stethoscopes is relevant for both medical instrumentation and pulmonology. The purpose of the work. Development of a wearable hardware and software package for diagnosing the functional state of the lungs based on a quantitative assessment of the characteristics of breathing sounds. Results. A digital stethoscope has been developed and tested using a studio electrodynamic microphone with an operating frequency range from 20 Hz to 20 kHz and an analog-to-digital converter with a 24-bit bit rate. An algorithm for analyzing lung sounds was used based on an assessment of the frequency-time and amplitude parameters of breathing sounds. The study shows the high efficiency of differential diagnosis of normal and pathological breathing, classification of a number of functional disorders of the respiratory system in the low- and medium-frequency ranges of breathing sounds. Practical significance. The results of the study can be used for the further development of digital stethoscopes and the expansion of their functionality based on the analysis of time-frequency and amplitude parameters of breathing sounds.

Mohammed Belal Development of a wearable hardware and software package for quantifying the characteristics of breathing sounds // Biomedical Radioelectronics. 2026. V. 29. № 6. P. 141−146. DOI: https://doi.org/10.18127/j15604136-202606-24

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