随着数字产品的普及，个性化的定制服务也在走向每一个普通人。打电话时，我们听到的不再是单调的“嘟嘟”声，而是悦耳动听的音乐。电话簿里不同的人来电，我们听到的电话铃声（ringtone）也会不同。今天，我们就来说说“彩铃”在英文中的说法。

A ringback tone is an audible indication that is heard on the telephone line by the caller while the phone they called is still in use. It is normally a repeated tone, designed to assure the calling party that the called party's line is ringing.

Ringback tone（接通回音）指电话处于正常使用状态时，打电话的人从听筒中听到的声音提示。这种声音一般都是一个重复的音调，目的只是提示打电话的人，对方的电话正在接通中。

Ringback music, also called personalized ringback tone, is a piece of music heard by the caller instead of the traditional telephone ring signal when a telephone call is placed.

Ringback music（“个性化接通回音”）则是打电话时，传统的电话提示音被音乐所取代，于是成为了我们所说的“彩铃”。