A soundboard is a flat, resonant surface found in many musical instruments, including:
* Pianos: The soundboard amplifies the vibrations of the strings.
* Harpsichords: The soundboard resonates with the plucking of the strings.
* Guitars: The soundboard transmits the vibrations from the strings to the air.
* Violins, cellos, etc.: The soundboard amplifies the vibrations from the strings.
So, while the word "sound" doesn't directly refer to a specific instrument, it does describe a key component of many instruments.