| 摘要 |
FIELD: transportation. ^ SUBSTANCE: casing includes bearing decorative cover of solid polymer material, on inner side of which soundproof fettling is stuck, which includes, at least, one flat-sheet soundproof panel, consisting of perforated layer of pore soundproof material, and layer of external front safety sound transparent film. At that, perforate holes are made open-ended in pore soundproof layer and in layer of external front safety sound transparent, herewith perforation coefficient is k = Sper/Span, = 0.02...0.06, where Sper - is summed square of perforate holes, m2, Span - square of panel front surface, m2. ^ EFFECT: improvement of soundproof effect. ^ 3 dwg |
