Synonyms of sounding board

Noun

1. sounding board, person, individual, someone, somebody, mortal, soul

usage: 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, soundboard, resonator, cavity resonator, resonating chamber

usage: (music) resonator consisting of a thin board whose vibrations reinforce the sound of the instrument