W318 咳嗽音の特徴抽出法の研究(エルゴノミック・デザイン2)(シンポジウム : 福祉工学)

概要

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For purpose of detecting a cough sound, we analyzed cough sounds acoustically and searched parameters to discriminate the cough sounds from the other sounds (voice and noise sounds). The cough sounds from 5 subjects (3 patients with respiratory disease and 2 healthy subjects) were recorded at supine position, using digital audio tape recorder, and the cough from 2 subjects (patient with respiratory disease) were recorded during sleep, by IC recorder with 8KHz sampling interval. To extract the characteristic of cough sounds, we transformed from sound waves to sound level (amplitude) at first. From curve of amplitude, duration of each cough, a period of time from initial deflection to the maximum sound level, slope of initial deflection, sharpness of amplitude curve were measured. As the result, we could discriminate cough sounds with 80-90% of probability.
社団法人日本機械学会の論文
2001-08-03