Apple published a paper, Toward a better understanding of nonoccupational sound exposures and associated health impacts: Methods of the Apple Hearing Study, for Apple’s Hearing Study.
This new paper describes the methods of the study, which collects data from hearing tests, sound level at which the participants exposure to environment and headphone, the cardiovascular metrics and their listening habits.
It provides a good overview of the data collection methods and some of the important facets of the study. Click here to see the full article.
Exposure Research Lab 