2008 年 10 巻 2 号 p. 243-252
In recent years, message communication using sound has appeared in various contexts in ordinary life. Sounds like these are called "sign sounds". The purpose of sign sounds is to communicate a message. However the ease of message understanding and listening comfort have rarely been taken into consideration. Because people have different tastes and attach a different "image" to sign sounds according to their individual sensibility, it is important for each person to be able to make melodies freely and easily, and customize sign sounds. However, creating melodies is not easy for the ordinary per-son. For this reason, in this research we propose a sign sounds family design system using an Interactive Genetic Algorithm (IGA). An "Interactive Genetic Algorithm" (IGA) is a Genetic Algorithm (GA) which simulates the evolution of living things, where the evaluation part of the GA is handled subjectively by a human being. The proposed system produces three kinds of sign sounds which informs the user of start, finish and warning based on one melody generated by the IGA system. Experimental results showed that this system is effective for generating sign sounds family and generated sign sounds are liked by users.