Metal wires stretched between two fixed points; the hammers strike them, causing them to vibrate and produce sound.
treble bridge
Piece of wood over which the strings in the treble range are stretched; it transmits their vibrations to the soundboard.
keyboard
Series of piano keys (52 white and 36 black).
muffler pedal
In an upright piano, it lowers the muffler felt; in a grand piano, it prolongs the notes (sostenuto pedal).
damper pedal
Pedal that increases the duration of string resonance by keeping the dampers raised.
hitch pin
Piece attached to the metal frame; the lower end of the string attaches to it.
bass bridge
Piece of wood over which the bass strings are stretched; it transmits their vibrations to the soundboard.
metal frame
Metal body that supports the tension of the strings.
soundboard
Flat surface that amplifies the string vibrations transmitted by the bridges.
keybed
Part of the piano projecting from the case; it supports the keyboard.
soft pedal
In the upright piano, it brings the hammers closer to the strings to reduce their impact; in a grand piano, it limits the hammer impact to a section of the string.
pedal rod
Piece of wood that connects the pedal to the mechanism.
hammer rail
Felt-covered piece where the hammer shank rests when it falls back.
muffler felt
Strip of felt that comes between the strings and the hammer heads when the muffler pedal is pressed; it lowers the volume of sound.
tuning pin
Piece of wood or metal where the end of the string is attached; it adjusts string tension to obtain the exact tone.
pressure bar
Metal bar under which the strings pass, marking the top of the section of vibrating strings.
hammer
Piece of wood with a felt-covered end (head) that strikes one or more strings causing them to vibrate.
case
Wooden box that encloses the inner workings of the piano and protects them.
key
White or black lever pressed by the fingers to trigger a mechanism that causes the hammer to strike one or several strings.
