Abstract: A novel ankle gapping device includes a lower leg engaging apparatus, a foot engaging apparatus, and a biasing member disposed between the lower leg engaging apparatus and the foot engaging apparatus. The leg engaging apparatus is adapted to securely engage a user's leg such that the leg engaging apparatus will remain stationary when the biasing member exerts an upward force thereon. The foot engaging apparatus is contoured to fit the user's foot. In a particular embodiment, the biasing member is a pneumatic biasing member, such as an inflatable tube that is actuated by a pump. As the pump provides compressed air (or some other fluid) to the biasing member, the pressure inside the biasing member increases, causing an increase in the volume of the biasing member. This pressure and volume increase exerts an upward force via the leg engaging apparatus to the lower leg, and a downward force via the foot engaging apparatus to the foot.

Abstract: A novel ankle gapping device includes a lower leg engaging apparatus, a foot engaging apparatus, and a biasing member disposed between the lower leg engaging apparatus and the foot engaging apparatus. The leg engaging apparatus is adapted to securely engage a user's leg such that the leg engaging apparatus will remain stationary when the biasing member exerts an upward force thereon. The foot engaging apparatus is contoured to fit the user's foot. In a particular embodiment, the biasing member is a pneumatic biasing member, such as an inflatable tube that is actuated by a pump. As the pump provides compressed air (or some other fluid) to the biasing member, the pressure inside the biasing member increases, causing an increase in the volume of the biasing member. This pressure and volume increase exerts an upward force via the leg engaging apparatus to the lower leg, and a downward force via the foot engaging apparatus to the foot.

Abstract: A novel ankle gapping device includes a lower leg engaging apparatus, a foot engaging apparatus, and a biasing member disposed between the lower leg engaging apparatus and the foot engaging apparatus. The leg engaging apparatus is adapted to securely engage a user's leg such that the leg engaging apparatus will remain stationary when the biasing member exerts an upward force thereon. The foot engaging apparatus is contoured to fit the user's foot. In a particular embodiment, the biasing member is a pneumatic biasing member, such as an inflatable tube that is actuated by a pump. As the pump provides compressed air (or some other fluid) to the biasing member, the pressure inside the biasing member increases, causing an increase in the volume of the biasing member. This pressure and volume increase exerts an upward force via the leg engaging apparatus to the lower leg, and a downward force via the foot engaging apparatus to the foot.

Abstract: A novel ankle gapping device includes a lower leg engaging apparatus, a foot engaging apparatus, and a biasing member disposed between the lower leg engaging apparatus and the foot engaging apparatus. The leg engaging apparatus is adapted to securely engage a user's leg such that the leg engaging apparatus will remain stationary when the biasing member exerts an upward force thereon. The foot engaging apparatus is contoured to fit the user's foot. In a particular embodiment, the biasing member is a pneumatic biasing member, such as an inflatable tube that is actuated by a pump. As the pump provides compressed air (or some other fluid) to the biasing member, the pressure inside the biasing member increases, causing an increase in the volume of the biasing member. This pressure and volume increase exerts an upward force via the leg engaging apparatus to the lower leg, and a downward force via the foot engaging apparatus to the foot.

Abstract: An apparatus for reducing noise radiated from a complex vibrating surface includes: a motion sensor responsive to a region of the vibrating surface that contributes to a noise field in a fluid medium; a controller having a substantially fixed transfer function, where the controller is responsive to an electrical motion signal produced by the motion sensor and is operative to produce an electrical antinoise signal; and an acoustic driver responsive to the electrical antinoise signal and operative to produce and an acoustic antinoise field that is substantially 180.degree. out-of-phase with the original noise field. The antinoise field reduces the original noise field by the process of destructive interference without substantially affecting the motion of the vibrating surface.