relating to sound or hearing

The microphone converts acoustic waves to electrical signals for transmission. 麦克风把声波转换成电信号进行传送。

used to refer to a musical instrument that is not made louder by electrical equipment

an acoustic guitar 原声吉他

the way in which the structure of a building or room affects the qualities of musical or spoken sound

The concert was recorded in a church that is famous for its acoustics. 这场音乐会是在一座以音响效果闻名的教堂内录制的。