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Vehicles |
Buses and railway
coaches Inadequate transmission loss of the floor is often the prime cause of a poor sound insulation in a bus or railway coach. Floors are frequently only of single thickness and made from plywood to an overall thickness of 20 - 30 mm. Such materials are relatively low in weight (650 - 750 Kg/m3) and very stiff, resulting in a low coincidence frequency, low transmission loss and high radiation of structure borne sound. |
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In order to improve the acoustic properties,
a thin layer of Damping
glue DG-A2 or Viscoelastic
sheet VS sandwiched between two layers of plywood can be used to
improve the acoustic performance comparable with the characteristics of
the heavy and expensive conventional solutions.
Vehicle bodies DC-P 5 to reduce resonant vibrations. Fork-lift trucks and off-highway
equipment |
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A | S-417 05 Göteborg | SWEDEN
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