ಅರ್ಥ : A person whose reactions to something serve as an indication of its acceptability.
ಉದಾಹರಣೆ :
I would use newspapermen as a sounding board for such policies.
ಅರ್ಥ : (music) resonator consisting of a thin board whose vibrations reinforce the sound of the instrument.
ಸಮಾನಾರ್ಥಕ : soundboard