Skip to main content

Apple Developer Docs

Fonts Symbols

HealthKit / HKMetadataKeyHeadphoneGain

Contents

Declaration
See Also

HKMetadataKeyHeadphoneGain

Declaration

let HKMetadataKeyHeadphoneGain: String

See Also

Audio Event Keys

HKMetadataKeyAudioExposureLevel
HKMetadataKeyAudioExposureDuration

Open on developer.apple.com

HealthKitGlobal Variable

iOS 16.4+iPadOS 16.4+Mac Catalyst 16.4+macOS 13.3+visionOS 1.0+watchOS 9.4+

Declaration
See Also

Built on 2026-05-07