Acoustic Sensors for Biomedical Applications by Nilanjan Dey & Amira S. Ashour & Waleed S. Mohamed & Nhu Gia Nguyen

Author:Nilanjan Dey & Amira S. Ashour & Waleed S. Mohamed & Nhu Gia Nguyen
Language: eng
Format: epub
ISBN: 9783319922256
Publisher: Springer International Publishing

The second HS has about 110 ms duration with more snapping quality, higher frequency components, and lower intensity compared to the first HS. Other various HSs occur based on the existence of abnormality or the age effect, such as:(i)The HS due to the rapid filling of the ventricle, which is comparatively short and comprises very low-frequency components of 25–50 Hz range.

(ii)The HS due to the active ventricular filling and the atrial contraction. This sound contains 20–30 Hz very low-frequency spectral components.

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