An apparatus and method for monitoring at least one battery condition. The hub has a periphery provided with an annular plate connected with the hub. The restoration utility accesses data corresponding to the selected tracks and sectors from the journaling device and restores the data to the track and sector locations of the storage device to the predetermined point in time. The system further includes a rigid frame that can hold the movable frame member under tension. This attenuation is achieved by filtering using filter coefficients that are set by a first filter characteristic setting unit using hearing characteristic parameters that are set by a hearing characteristic setting unit.