sound effect
US /ˈsaʊnd ɪˌfekt/
UK /ˈsaʊnd ɪˌfekt/

1.
音效
a sound other than speech or music made artificially for use in a play, movie, or other broadcast production.
:
•
The movie used realistic sound effects to enhance the action scenes.
这部电影使用了逼真的音效来增强动作场面。
•
The sudden thunder sound effect made everyone jump.
突然的雷声音效让所有人都吓了一跳。