sig·na·ture tune
noun/ˈsɪɡnətʃə tjuːn/
/ˈsɪɡnətʃər tuːn/
(British English)- a short tune played at the beginning and end of a particular television or radio programme, or one that is connected with a particular performer
（电视、广播节目的或某主持人主持节目时播放的）信号曲，开始曲，结束曲