or vice versa (REF_HTF) to control for the variable of listening fatigue or practice effects after。

https://www.apple.com/jp/health/pdf/Hearing_Health_Features_on_AirPods_Pro_2_October_2024.pdf

harmful substances from our product designs, and we go to great lengths to make sure that they stay that way. We are constantly designing our products to be...

https://www.apple.com/jp/environment/pdf/Apple_Regulated_Substances_Specification_Sept2018.pdf