sounding board
의미:
(아이디어·결정 등에 대한) 반응 테스트의 대상이 되는 사람[그룹]
예시
The reaction of your sounding board gives you an idea of how your eventual audience will react.
We have streamlined the Sounding Board and made it easier for you to contribute ideas for tax system improvement.
The Sounding Board will normally consist of between six and nine members.