| Noun | 1. | sounding board - a person whose reactions to something serve as an indication of its acceptability; "I would use newspapermen as a sounding board for such policies" |
| 2. | sounding board - (music) resonator consisting of a thin board whose vibrations reinforce the sound of the instrumentforte-piano, piano, pianoforte - a keyboard instrument that is played by depressing keys that cause hammers to strike tuned strings and produce sounds cavity resonator, resonating chamber, resonator - a hollow chamber whose dimensions allow the resonant oscillation of electromagnetic or acoustic waves sound hole - a hole in a soundboard (as of a violin) designed to resonate with the tones stringed instrument - a musical instrument in which taut strings provide the source of sound music - an artistic form of auditory communication incorporating instrumental or vocal tones in a structured and continuous manner |