mike check

剑桥词典

a check to see if a microphone is working correctly, usually by saying something into it
檢查話筒，檢查麥尅風
The sound engineers were up on the stage doing mike checks . 音響工程師在台上檢查話筒。
US informal
a way of interrupting a politician or other person who is making a speech , by shouting "mike check " and then saying why you do not agree with what they are saying
“檢查話筒”（高聲喊出以打斷政客或其他人縯講的方式，然後告知自己爲什麽有異議） 返回 mike check