| 摘要 |
<P>PROBLEM TO BE SOLVED: To make a theremin easy to perform by making a sound production frequency stable against temperature change. <P>SOLUTION: In addition to a conventional example in which fluctuation of musical intervals against temperature change is reduced by making two oscillation circuits for generating sounds by heterodyne be same circuits, a second matching circuit 22 equivalent to a first matching circuit 12 and a pseudo antenna circuit 23 equivalent to an antenna circuit 13 are disposed also on a second oscillation circuit 21 side. Because the two oscillation circuits and the circuits connected to the oscillation circuits of a theremin become equivalent, the theremin is improved in stability of a sound production frequency against temperature to become easy to perform. <P>COPYRIGHT: (C)2012,JPO&INPIT |
