fade-out
/ˈfeɪdaʊt/noun
1- a film-making and broadcasting technique whereby an image is made to disappear gradually or the sound volume is gradually decreased to zero（电影制作中画面的）淡出, 渐隐; （广播中音量的）渐弱。
1.1
- a gradual and temporary loss of a broadcast signal（广播信号的）暂时中断：
radio fade-outs.
无线电信号的暂时中断。