the.com/ringtone

means The customizable sound or tune a mobile phone plays to signal an incoming call or notification.

from A straightforward compound of 'ring,' the old word for a bell's sound dating back to Old English 'hringan,' and 'tone,' from Greek 'tonos' meaning a stretching or pitch, via Latin and French. The word itself is modern, rising with the mobile phone in the 1990s to describe the electronic bleat that replaced the literal ringing bell of landline phones — the name kept the ancestral memory of a bell long after the bell itself vanished.