Piano (Italian: pianoforte) is a keyboard instrument in western classical music, which consists of 88 keys (52 white keys and 36 black keys) and a metal soundboard. Italian Bartolomeo Cristofori (1655-1731) invented the piano in 1709.
The piano's musical range ranges from large character family A2(27.5Hz) to small character family c5(4 186Hz), covering almost all the musical tones in the musical tone system. Piano is widely used in solo, ensemble, accompaniment and other performances, and it is very convenient to compose and rehearse music. By pressing the keys on the keyboard, the player affects the hammer wrapped in felt inside the piano, and then hits the steel wire string to make a sound. This piano needs regular maintenance to keep its tone unchanged.
The piano is constructed as follows:
The right pedal is also called the sustain pedal and the * * * sound pedal. It was invented by Englishman John Broadwood in 1783. It is usually the right pedal under the piano, and it is also called "amplifier" in some books. When the damper pedal is pressed, the damper, which is usually pressed on the string, will immediately rise. Let all the strings vibrate constantly. After the pedal is released, all the vibrators are pressed against the strings to stop pronunciation. Because pressing the brake pedal will amplify the sound of the piano to a certain extent, it is also called the loud pedal.
Left pedal, also known as ulnar cord. In the platform piano, when you step on the soft pedal, the hammer will move to the side immediately, reducing the volume and making the sound very pure and soft. On the upright piano, when stepping on the soft pedal, the hammer moves closer to the strings to reduce the impulse, the length and intensity of the blow and the volume. Its function is not only to help players play weaker, but also to increase the softness of the sound and remove any percussion components from the sound quality. The left pedal is often compared to "the silence of the gyrator".
Middle pedal, select sostenuto. Pedals with special properties. Grand piano's middle pedal is used as a "special Legato pedal". The usage is to play and hold down the key first, and then hold down the "special sustain pedal". The key just played will continue to sustain, and other keys will not be affected. When the middle pedal of most modern upright piano is stepped on, a movable flannel will be sandwiched between the hammer and the strings, making the volume extremely low. Generally, it is only used when playing the piano at night or in the early morning, so as not to disturb the peace of neighbors. So it is sometimes called double weak pedal.
The tuning pin is a nail bolt that can be twisted and rotated with a special wrench. Its turntable is specially made of high carbon steel, with a lock, and the strings can be firmly wound on the pin shaft, which can maintain and stabilize the pitch for a long time under the action of high-strength tension of the strings. The hammer is wrapped with high-quality felt or flannel, because this layer of "skin" is mostly made of wool, so it is also called wool hammer. It is attached to the key. When the keys are pressed, the hammer will knock off the strings and make the piano sound through the vibration of the strings. Therefore, its function is to strike the strings fastened by the tuning nails.
Damper Damper is attached to the string to stop the vibration of the string. For example, if you press the keys on the piano, the hammer inside the piano will strike the copper strings and make a sound through the vibration of the strings.
The action longitudinal beam is the soul of the whole piano and the most important accessory, which is connected with the keys and hammers.
Sound board The sound board is located on a big wooden board inside the piano. Maple solid board for high-grade piano and density board for modern low-end piano. It is attached to the tuning nail and clings to the strings. When the strings vibrate, the soundboard will efficiently couple sound waves into the air, that is, the sound will be reflected and amplified through the soundboard.
Keyboard The whole keyboard consists of black keys and white keys. There are 36 black keys, 52 white keys and 88 * * *. The white key is the natural scale in C major, and black keys is its variation, which may also be the natural sound in other major.
The vowel letter a is pronounced short in stressed closed syllables? /,when pronounced, the tail of the tongue is close to the lower teeth, the tongue is tilted forward, and the position of the tongue is low, which is the lowest among the four front vowels, but the one with the largest opening is a short vowel, but it has a considerable length in actual pronunciation. The gums are between half-open and open, and the lips are not round. This kind of sound mainly appears in the position of prefixes and words, such as:
Cushion cushion
Map map
Bag
Cat cat
Hat hat
Fan Fan
racket
apple
I hope it can help you solve the problem.