| 摘要 |
FIELD: process engineering.SUBSTANCE: invention relates to musical instruments. Resonance deck comprises wood board of elongated approx trapezoidal shape. Said board is provided with central lengthwise shaped tailpiece arranged at board face and with central shaped reinforcing bar at back with two lateral shaped elements or resonance panels located in symmetry about said reinforcing bar. Reinforcing bar cross-section has central section of increased depth or height and two adjacent mirror sides or side strips of height or depth gradually converging in outer direction via curved arched profile to preset maximum magnitude. Minimum height or depth of sides or side strips of reinforcing bar makes 1-5 mm. At least lower half of reinforcing bar crosswise width of every said side of side strip makes 2/3 to 3/3 of central section crosswise width.EFFECT: higher structural strength, good sound conductivity, optimum and stable operation, longer life.3 cl, 5 dwg |
