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