Oral function evaluation device, oral function evaluation system, and oral function evaluation method

Abstract

An oral function evaluation device includes: an obtainer that obtains voice data; an extractor that extracts a feature from the voice data; an S/N ratio calculator that calculates a signal-to-noise (S/N) ratio of a second average intensity of a sound collected in a period when a voice is uttered to a first average intensity of a sound collected in a period when no voice is uttered; a determiner that determines an estimating equation; and an evaluator that evaluates the deterioration state of oral function through assessment using an oral function evaluation indicator, based on the estimating equation determined and the feature extracted. As the estimating equation, the determiner determines: a first estimating equation that includes a sound-pressure-related feature when the S/N ratio is greater than a first threshold; and a second estimating equation that does not include the sound-pressure-related feature when the S/N ratio is the first threshold or less.