A hammer assembly for a grand piano comprising: a hammer, a hammer shank, a tubular lever interface, and a moveable knuckle. The artificial ear includes a plurality of microphones; and one or more structures disposed between the plurality of microphones. A liquid crystal display panel is controlled synchronously with the backlight in order to selectively pass or block portions of the light produced by the backlight in order to produce one or more left eye image frames in the left eye viewing envelope and one or more right eye image frames in the right eye viewing envelope. The coated metal strip is useful for containers, such as cans and can ends, as well as for automobiles, appliances, aerospace, construction and electrical devices. The lateral vibration of the first and second wiper devices, as the wiper devices engage any protruding pills, thereby manipulates the protruding pills into the laid-down position in the corresponding receptacles.