How does seat condition or suspension affect WBV measurement results?

Seat condition plays a surprisingly big role in WBV exposure levels. Suspension seats are designed to absorb and dampen vibration before it reaches the operator — but only when they’re properly maintained and adjusted.

If the suspension mechanism is worn, incorrectly set for the operator’s weight, or damaged, more vibration may pass directly through to the person seated.

In some cases, poorly performing seats can significantly increase exposure levels — even where the vehicle itself hasn’t changed.

So during WBV assessments, seat performance is usually considered alongside machine condition and operating environment. It’s not just about the equipment — it’s about the whole system.