| 摘要 |
FIELD: aircraft, ship construction and other industries, particularly laminated sound-absorbing panels provided with light-weight filler of corrugated sheet material. ^ SUBSTANCE: sound-absorbing panel comprises upper and lower coverings and zigzag filler arranged in-between. The coverings and filler are formed of composite material including phenol binding agent and fabric filler. Binding material content in upper covering is 5-20% by weight and in lower covering is 30-50% by weight. Zigzag filler includes Z-shaped corrugations with teeth inclined at 40-50° angles to sound propagation direction. ^ EFFECT: increased sound absorption in wide frequency range and decreased labor inputs for panel production. ^ 2 cl, 1 tbl, 1 dwg |
