Earcon
An earcon is an acoustic icon - a synthetic, abstract sound used in interfaces to convey information or confirm actions, analogous to an icon in visual UIs. The term originates from HCI (human-computer interaction) research and emphasizes the information-carrying function of a sound rather than its aesthetic qualities.
Why It Matters
Earcons allow interfaces to communicate status, error states, and confirmations without requiring the user to look at the screen. In accessibility-focused design, well-designed earcons are essential for users with visual impairments, and in voice-first interfaces they are the primary feedback mechanism.
Example
When Audio Hooks Studio designs a UI sound kit, each sound is evaluated as an earcon: is it semantically distinct enough that a user can learn what it means through repetition alone, without visual context? Sounds that fail this test are redesigned.