Recognition of Devoiced Vowels Using Optical Microphone Made of Multiple POF Moisture Sensors

摘要

A novel optical fiber microphone system for recognizing devoiced vowels has been studied. This system consists of optical detection of the moisture pattern formed by a devoiced breath and its recognition by modified DP-matching. To detect the moisture pattern of devoiced vowels, five plastic optical fiber moisture sensors with fast response were developed and used. Using this system, a high discernment rate of over 93% was obtained for de-voiced vowels. This system will be used for verbally handicapped people to create sounds with minimal effort in the near future.