| 摘要 |
PURPOSE:To reduce noise released outside a tire by restraining noise propagated in the air filled in the tire. CONSTITUTION:Noise propagated in the air in a tire 11 is irregularly reflected and mutually interfered, when it is struck against the inside of the tire 11 waving in the meridional direction. Hereby, the sound pressure level of noise in the tire 11 is lowered, and noise released outward is reduced. |
