The SPL both inside and outside a John Deere 310SK Backhoe was measured during operation of the backhoe claw. The SPL at most frequencies is reduced inside the cab due to the noise, vibration, and harshness (NVH) kit installed within. This is most notable at 63Hz and 125Hz. These critical frequencies reflect the firing frequency of the engine and the blade pass frequency of the fan. The overall SPL is reduced from 89.2 dBA to 76 dBA – a more than 50% reduction.