An audio file, frequently in the MP3 format, designed for use as an alert sound on a mobile communication device indicating an incoming call. This audio file commonly replaces the default tone set by the manufacturer, providing personalization. For instance, instead of a standard ring, a user might choose a segment of music or a pre-recorded message.
The widespread adoption of customizable notification sounds offers several advantages. Users can instantly identify an incoming call without visually checking the device. Historically, the availability of user-selected audio alerts has been driven by advancements in digital audio technology and the increasing storage capacity of mobile phones. This customization enhances the user experience and provides a form of self-expression.