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	Where and how to use noise control materials in tractor cabs.

Absorption materials soak up noise inside tractor cabs, and similar applications. They reduce reverbaeration (“tin can” effect)
eg. soft foam, porous materials, fibreglass, rockwool. Absorption materials are typically used on top and sides of cab and around seats.

Damping Compounds reduce noise by absorbing vibration
eg. foams, rubber, soft wood, paint on/trowel on compounds.
Damping compounds are typically used inside the engine hood, instrument cover and instrument side panels

Barrier Materials reduce the penetration of external and engine noises into the cab.
eg. sheet metal, timber, vinyl.
They are typically used on the back of the firewall and under operator's platform

Isolation Materials Prevent vibration energy from passing from one point to another.
eg. rubber mounts, fibreglass, air cushions.
If the cab does not have isolation mounts the noise will be transmitted directly into the cab enclosure

NOTE: Take care to cover holes around seat, brakes, clutch and other openings to prevent noise leakage. Use a gunned sealant and rubber grommets to seal around coax and electrical cables

DISCUSS YOUR SPECIFIC NEEDS WITH YOUR NOISE CONTROL MATERIAL SUPPLIER

ACKNOWLEDGMENT: Noise Control for Off-Road Vehicles, NYLEX Bulletin 330.

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proudly sponsoring the Farm Noise and Hearing project to promote the
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