300,000 iPhone users join Apple's landmark hearing study
Knowledge-focused
Ongoing
This study, run by Apple and the University of Michigan, tracks headphone and environmental sound exposure in 300,000 US adults using iPhones and Apple Watches. Participants answer surveys and take hearing tests through the Research app. The goal is to understand how everyday sou…
Sponsor: Apple Inc. • Aim: Knowledge-focused
Last updated Jun 27, 2026 11:02 UTC