acoustic
adjective uk/əˈkuː.stɪk/ us/əˈkuː.stɪk/
声音的;听觉的
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。
（乐器）原声的，自然声的，不用电传音的
used to refer to a musical instrument that is not made louder by electrical equipment
an acoustic guitar 原声吉他
acoustic
noun [ C usually plural ] uk/əˈkuː.stɪk/ us/əˈkuː.stɪk/
（建筑物、房间的）传音效果，音响效果
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。