A piano is a keyboard instrument that produces sound when hammers strike strings. These hammers are activated by pressing keys on the keyboard. The struck strings vibrate, creating musical notes.

Here are some key characteristics of a piano:

• Keyboard: Features a range of keys, typically 88 in a full-sized piano, that correspond to different notes.
• Strings: Contains numerous strings stretched tightly across a frame. The length and thickness of the strings determine the pitch of the notes.
• Hammers: Small, felt-covered hammers strike the strings when a key is pressed.
• Soundboard: A large wooden board that amplifies the sound produced by the vibrating strings.
• Pedals: Usually has two or three pedals that modify the sound in various ways, such as sustaining notes or softening the tone.

Pianos come in two main types:

• Grand Pianos: Have a horizontal soundboard and strings. Known for their superior sound quality and dynamic range.
• Upright Pianos: Have a vertical soundboard and strings, making them more compact and suitable for smaller spaces.

For further reading, you can check out these resources:

• Wikipedia: Piano
• Britannica: Piano