whistle

口哨, 汽笛, 啸啸声, 口哨声

the sound made by something moving rapidly or by steam coming out of a small aperture; the act of signalling (e.g., summoning) by whistling or blowing a whistle; a small wind instrument that produces a whistling sound by blowing into it; acoustic device that forces air or steam against an edge or into a cavity and so produces a loud shrill sound

吹口哨, 鸣汽笛, 发嘘嘘声

用口哨或吹哨传意, 用口哨演奏