| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a music data recording medium capable of giving a listener a comfortable and relaxed feeling through a recording medium such as a music CD, and capable of raising concentration. <P>SOLUTION: A high frequency signal having a frequency of 18kHz±3kHz and a tempo (tempo 116) of 29×2<SP>n</SP>((n)=0, 1, 2, 3) is recorded on the music data recording medium, and the high frequency signal is generated through a reproducing device at the time of reproduction. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
