| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sound reproducing device capable of solving the problems that (1) the appropriate sound volume of BGM varies with operators and varies with the surrounding environment and the contents of work as well and further (2) varies with the object to which the operator's consciousness concentrates and therefore it is heretofore difficult to find the appropriate sound volume. <P>SOLUTION: The sound reproducing device is provided with a reproducing means 40 which provides an audio signal of a musical piece to be reproduced as the BGM and a speaker 44 which outputs the audio signal as the BGM. The device is provided with sensors 21 to 29 which detect living organism information of the operator. The device is provided with a correlation detecting circuit 317 which determines the correlation between the living organism information detected by the sensors 21 to 29 and the audio signal. The detected output of the correlation detecting circuit 317 is fed back to the reproducing means 40 to control at least one of the sound volume, sound quality or tempo of the BGM outputted from the speaker 44. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
