An apparatus and method for detecting the presence of abrupt noise is provided. Methods of treating patients who have diseases characterized bone loss are disclosed. The preferred siding unit has a tapered thickness and a convex face. If the pixel is of a motion picture, the compressed pixel data of the previous time frame image is decompressed, and an overdrive process is performed on the decompressed pixel data and the original pixel data of the current time frame image to produce an overdrive output. The portion of the strings between the bridge and the nut overlie a plurality of frets rigidly attached to the portion of the body portion between the nut and the bridge. If the state of a ribbon is not changed after a control cycle is repeated for a set time, the rotational speed of the drive motors is increased step by step.