The Narrowband Acoustic Model with the Reconstrction Technique(<Mini Special Issue>Biomedical Modeling)

概要

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We have evaluated the narrowband acoustic model based on the extremal sampling technique and the hypothesis, in which no information consisted in the monotonous part from the minimum to the maximum of the bandpass filtered waveform and the vice versa. The sampled extrema were manipulated by the three steps of ±20%, ±40% and ±60% of amplitude errors and more three steps of ±4%, ±9% and ±14% of phase errors. The subjective scores have determined that the margin of error of the extrema exceeded ±20% for amplitude and ±4% for phase. Although the sinusoidal interpolation between two successive extrema of the speech and musical data is better than the other four reconstruction techniques by using the linear function, the sigmoid, the cosine cubed and the cosine to the 0.3^<rd> power, no significant difference is observed for the reproduction of the door noise, suggesting that the noises may be roughly identified in the human auditory system.
バイオメディカル・ファジィ・システム学会の論文