conduction testing, referred to as reference hearing test (REF), with the software-based Hearing Test Feature (HTF). Participants were randomized to receive...

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

Suppliers must certify compliance with this specification and provide required documentation (including required test data, Full Material Disclosure (FMD), ...

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