PROBLEM TO BE SOLVED: To shorten a falling sleep latent time by plural sounds which are linked with a biological rhythm which is a period of breathing or a heart rate of a subject for improving sleep.SOLUTION: A sound source device 20 comprises: a biological information acquisition part 210 for acquiring biological information of a subject E a sound content acquisition part 42 for acquiring a sound content a sound source 40 for reproducing a sound signal based on the sound content acquired by the sound content acquisition part 42 and a control part 240 for controlling the sound content acquisition part 42 so that the sound content which is an object of reproduction of the sound source 40 is switched to other sound content out of the plural sound contents at a period according to the biological information acquired by the biological information acquisition part 210. Waveforms of some or all sound contents acquired by the sound content acquisition part 42 are configured so that, an amplitude is almost attenuated from an amplitude maximum time when the amplitude is maximum, toward a finish time of the waveform.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】睡眠を改善する場合に、被験者の呼吸や心拍の周期である生体リズムと連動させた複数の音によって、入眠潜時を短縮する。【解決手段】音源装置20は、被験者Eの生体情報を取得する生体情報取得部210と、音コンテンツを取得する音コンテンツ取得部42と、音コンテンツ取得部42が取得した音コンテンツに基づいて音信号を再生する音源40と、生体情報取得部210が取得した生体情報に応じた周期で複数の音コンテンツの中から音源40における再生の対象となる音コンテンツを切り換えるように音コンテンツ取得部42を制御する制御部240とを備え、音コンテンツ取得部42によって取得される一部又は全部の音コンテンツの波形は、振幅が最大となる振幅最大時から当該波形の終了時に向けて、振幅が略減衰する。【選択図】図2
