signature tune

音标发音

As the signature tune was faded out, the voices of a group talking around a table were faded up.
一群人围着桌子讲话的声音随着节目的开始曲的逐渐减弱而逐渐增强。
They had gathered in London in the early hours of the morning, hoping to hear the probe broadcasting its signature tune across the vastness of space from the red planet.
他们一大早就聚集在伦敦，期待着能够听到火星探测器从那个红色星球、穿过浩淼的太空发出的信号。
gongwai.xaufe.edu.cn
The thesis was divided in four parts: the generation and management of digital certification, utilizing of Public system, utilizing of digital signature, the establishment of SSL secure tune.
本文共从四个部分阐述了网络数据安全的实现：数字证书的生成和管理、公开密钥加密的实现、数字签名的生成以及校验、SSL安全通道的建立。

And it was her idea to include the sound of the tabla, an Indian drum, in NDTV's signature tune before newscasts.
FORBES: News Delhi TV

a short tune used in broadcasting at the beginning and/or end of a particular programme or to mark the appearance of a particular performer

Asignature tuneis the tune which is always played at the beginning or end of a particular television or radio programme, or which people associate with a particular performer.