audible

听得见的、可听见的、清晰可闻的

Her voice was barely audible over the noise of the traffic.

在车流的噪音中，她的声音几乎听不见。

临场变阵、口头改换战术美式足球

The quarterback called an audible when he saw the defense shift.

四分卫看到防守阵型移动后，临场喊出变阵。