A piano is a keyboard instrument, widely used in western music for
solo performance, chamber music, and accompaniment, and also as
a convenient aid to composing and rehearsal.
The piano produces sound by striking steel strings with felt
hammers. These vibrations are transmitted though the bridges to
the soundboard.
The word piano is a shortened form of the word "pianoforte",
which is seldom used except in formal language. It is derived
from the original Italian name for the instrument, clavicembalo
col piano e forte. Literally harpsichord with soft and loud, this
refers to the ability of the piano to produce notes at different
volumes depending on how hard its keys are pressed.
As a keyboard stringed instrument, the piano is similar to the
clavichord and harpsichord. The three instruments differ in the
mechanism of sound production. In a harpsichord, strings are plucked
by quills or similar material. In the clavichord, strings are
struck by tangents which remain in contact with the string. In
a piano, the strings are struck by hammers which immediately rebound,
leaving the string to vibrate freely.