It is difficult for the deafblind or the hearing impaired persons to control their voice pitch because they cannot perceive their voice pitch. Especially in case of singing a song it is very difficult for them to control their one because they must keep a musical tone in stably. A voice pitch control system was developed to assist their singing by using a tactile display. The tactile display is equipped with sixty-four piezoelectric vibrators in four rows (16 x 4 rows). A user put his/her the last joint of index finger on the tactile display to receive tactile stimuli. The user can control his/her voice pitch using tactile feedback. In this study the voice pitch of two subjects were measured to calculate interval deviation which was difference from the voice pitch to a target musical interval. The average data of the interval deviation including both subjects was 117.5[cent]. This result shows that the deafblind subjects in this study be able to sing a song as much accuracy as hearing adults or hearing children.

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It is difficult for the deafblind or the hearing impaired persons to control their voice pitch because they cannot perceive their voice pitch. Especially in case of singing a song it is very difficult for them to control their one because they must keep a musical tone in stably. A voice pitch control system is developed to assist their singing by using a tactile display. The tactile display is equipped with sixty-four piezoelectric vibrators in four rows. There are sixteen piezoelectric vibrators in each row which is corresponded to semi tone of equal temperament of 12 degrees. User put his/her the last joint of index finger on the tactile display to receive tactile stimuli. First and second row from the right side show voice pitch frequency. Third and fourth row show teaching musical scale. If voice pitch frequency is corresponded to a teaching musical scale user perceive a straight line. In this paper we describe the voice pitch control system which we developed and its evaluation.

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ギター演奏においてコード列演奏は最も基本的な演奏形態の一つである。本論文では,ギター初心者を対象とし,入力されたコード列に対して,押弦時の指配置やコードチェンジ時の指の動きに対する負荷が最も軽くなるコードフォーム列を,実演奏時のミスの量から最小2乗法によって求めた負荷値に基づいて奏者に応じて決定するシステムについて述べている。本システム及びコードブックによるコードフォーム列に対する実演奏の押弦失敗率を比較する実験を行った結果,初心者にとって本システムが十分に有用であることが示されている。

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