| 摘要 |
PROBLEM TO BE SOLVED: To provide an acoustic musical instrument sound quality and sound volume amplifier capable of improving the sound quality of the acoustic musical instrument from bass to a high-pitched tone and increasing the sound volume thereof and increasing expression power even if costly blanks and intricate electric circuits are not adopted. SOLUTION: Multistage pitch resonance needles 3 having many resonance needles 3-l, 3-1,...3-n which respectively resonate in respective scales and a bass resonance plate 4 consisting of a tuning fork are installed by disposing their planar surfaces opposite to each other in nearly parallel apart a prescribed spacing L. |
