| 摘要 |
<p>PURPOSE: To easily execute tuning work and to improve the degree of freedom in a working procedure by applying load to each string and turning a tuning pin so that the displacement value of the string or the reaction value due to the tension of the string becomes prescribed oscillation frequency. CONSTITUTION: The set oscillation frequency fS of a string 1 with prescribed length L and prescribed linear densityσis determined by the tension TS of the string 1 and deformation H by load F at the tension TS is calculated. A loading part 2 applies load FS of a fixed value to the key depression position D of the string 1, a tuning pin 4 screwed into a frame 3 is turned by a tuning pin rotating part 5 so that the deformation H of the string 1 at the position is set up to a set deformation value HS at the calculated set oscillation frequency fS and the oscillation frequency (f) of the string 1 is set up to the set oscillation frequency fS, i.e., the string 1 is tuned. Consequently the tuning work can easily and efficiently be executed and the latitude of working can be improved.</p> |
