| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method of tuning piano that enables even an unskilled person to create a uniform sound in a short time by performing piano tuning work by using an ultrasonic wave generator. <P>SOLUTION: Disclosed is the method of tuning piano with which the hammer felt is less tensed by applying an ultrasonic wave to the felt while bringing an ultrasonic wave horn tip portion 1 of the ultrasonic wave generator into contact with a piano hammer felt surface 2 and forming gaps among felt fibers by less bundling the felt fibers. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
