|発明の名称||VOICE SIGNAL EMPHASIS DEVICE|
PROBLEM TO BE SOLVED: To provide clear voice even if reverberation and background noise exist in a public audio device, a megaphone, an intercom, a telephone, a broadcasting device and a voice guidance system or the like.
SOLUTION: A voice signal emphasis device includes: a band dividing section for dividing an input voice signal into a plurality of frequency bands; a time frame dividing section for dividing the signal of each frequency band, which is divided by the band dividing section, into a plurality of time frame; a power calculation section for calculating a mean power in each time frame which is divided by the time frame dividing section; a comparison section for comparing mean powers of each of time frames which are calculated by the power calculation section, with each other; an amplitude degree determination section for determining an amplitude degree of each of signals which are divided by the time frame dividing section based on the comparison result of the comparison section; an amplifier section for amplifying each of signals which are divided by the time frame dividing section, with the amplitude degree which is determined by the amplitude degree determination section; and an adding section for adding the signals in each of frequency bands, which are amplified by the amplifier section.
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