抄録
The purpose of this study is to obtain basic methodology for detecting danger on aged or handicapped people using acoustic signals. Firstly, kinds of danger that should be detected were narrowed down. This information was obtained by panel experiments that tested the limit of human danger recognition using only acoustic signals. Secondly, a signal processing system was developed for filtering out acoustic signals that represent danger. This system consists of wavelet transformation, homomorphic transformation, and hidden Markov process speech recognition.
