The working principle of piano

Piano is a percussion instrument among many musical instruments. It is different from other percussion instruments, such as drums, gongs, cymbals, etc., to strike the strings with hammers to make sounds directly. On the other hand, the piano makes the hammer hit the strings through a series of complicated lever (three-stage) mechanical movements. The first lever is the keyboard that we can usually see when we open the piano cover, and the second and third levels are the heart of the piano ~ the percussion machine. When we open the upper door panel of the piano, we can see that it consists of four parts; (1) stringer support (2) linkage (chuck) (3) rotary impact device (hammer integrated with it) (4) silencer. The linkage is what we call a secondary lever, and the rotary hammer is a tertiary lever. When we play the piano, we give the keyboard a force with our hands. A metal nail (the larger piano is made of wood) at the back end of the keyboard lifts the linkage device, and then the ejector pin on the linkage device hits the turntable. Finally, the strings are hit by the hammer on the pedestal of the turntable, which makes the strings vibrate. Then the string codes on the soundboard transfer the energy of string vibration to the soundboard to generate a louder * * sound, which is transmitted to the air and becomes a beautiful sound. The damper on the percussion machine can control the sound of the piano, and its clutch with the strings can make the sound disappear or continue.