Abstract: The invention provides an active noise reduction system which may be self-contained within a headset of the system, wherein circuitry within the system applies an active noise reduction profile to a signal to the speakers in the headset, to provide active noise reduction to the user of the headset, the system being arranged to receive power both from a power supply external to the system and from a battery of the system and to automatically modify the active noise reduction applied, in dependence on whether or not the system is connected to an external power supply.

Abstract: Provided is a folding ladder assembly for over-the-road trucks. The folding ladder assembly includes a fixed ladder rail secured to a vertical wall portion of the cab of the over-the-road truck, and a moveable ladder rail interconnected with the fixed ladder rail and positionable between a collapsed, storage position and an extended use position. The folding ladder assembly further includes a ladder stabilizing mechanism disposed at the upper and lower portions of the moveable ladder rail assembly for stabilizing the folding ladder assembly when it is positioned in the extended, use position.