to show what you think or feel by what you say, without stating it directly

He's been making noises about taking us all to Rio, but we haven't heard anything definite. 他一直暗示要把我们都带去里约，但是我们却没有听到任何确切说法。

to complain or make trouble

If things start going badly again, our members are sure to make noises. 如果事态再次恶化，我们的成员肯定会抱怨。