For the Bose QuietComfort Earbuds II, the sounds are far more than just functional. The "Power On" earcon indicates more than just powering up—this version creates a harmonic distinction between the other products for a particular reason: scanning your ear.
In this first-of-its-kind Audio User Experience™, the UX sound bounces around your ears and back into the buds, creating a custom noise-canceling profile. To make the experience even more holistic, the sound is also featured as an audio logo in their marketing.