Text: (1) A piece of fir or other resonant wood placed behind the strings of a piano for the purpose of increasing the power of the sounds. (2) In an organ, the sound board is that chamber of air into which the feet of the pipes are placed. (3) A wood screen placed behind a pulpit for the purpose of reflecting the preacher's voice; or over it, to prevent the sound from ascending into a lantern-tower, or a dome.

See Also: SOUND BOX; RESONANCE BOX

Source: 125