Sounding-board

Sound´ing-board`


n.1.(Mus.) A thin board which propagates the sound in a piano, in a violin, and in some other musical instruments.
2.A board or structure placed behind or over a pulpit or rostrum to give distinctness to a speaker's voice.
3.See Sound boarding, under Sound, a noise.
References in classic literature ?
If you stand on its summit and look at these two f-shaped spout-holes, you would take the whole head for an enormous bass-viol, and these spiracles, the apertures in its sounding-board.