![]() ![]() Historically, NIHL was a disease that primarily affected adult workers with high exposure to occupational noise ( Themann and Masterson, 2019). This study also demonstrates the feasibility of collecting clinically relevant exposure and health data outside of traditional research settings. The study’s analyses will promote understanding of the overall exposures to sound and associated impacts on hearing and cardiovascular health. The preliminary results indicate that environmental sound levels have been higher, on average, than headphone audio, about 10% of the participants have a diagnosed hearing loss, and nearly 20% of the participants have hearing difficulty. Participants, all of whom have consented to participate and share their data, have already contributed nearly 300 × 10 6 h of sound measurements and 200 000 hearing assessments. This paper describes the methods of the study, which collects data from several types of hearing tests and uses the Apple Watch noise app to measure environmental sound levels and cardiovascular metrics. The nationwide Apple Hearing Study, launched using the Apple research app in November 2019 (Apple Inc., Cupertino, CA), is characterizing the levels at which participants listen to headphone audio content, as well as their listening habits. Occupational noise exposures have been studied and regulated for decades, but nonoccupational sound exposures are not well understood. Globally, noise exposure from occupational and nonoccupational sources is common, and, as a result, noise-induced hearing loss affects tens of millions of people. ![]()
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