Orthogonality-Constrained CNMF-Based Noise Reduction with Reduced Degradation of Biological Sound

• Published in: Sensors (Basel, Switzerland) Vol. 21; no. 23; p. 7981
• Main Authors: Murakami, Naoto, Nakashima, Shota, Fujimoto, Katsuma, Makihira, Shoya, Nishifuji, Seiji, Doi, Keiko, Li, Xianghong, Hirano, Tsunahiko, Matsunaga, Kazuto
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 29.11.2021; MDPI
• Subjects: Acoustics; Angina pectoris; Automation; biological sound; biomedical signal processing; Cardiac arrhythmia; Chronic obstructive pulmonary disease; Methods; Microphones; Noise; noise reduction; respiratory sound; Sensors; Signal processing; Sound; vascular sound; Wearable computers; wearable device; Japan

The number of deaths due to cardiovascular and respiratory diseases is increasing annually. Cardiovascular diseases with high mortality rates, such as strokes, are frequently caused by atrial fibrillation without subjective symptoms. Chronic obstructive pulmonary disease is another condition in whic...