---
title: HKMetadataKeyAudioExposureLevel
framework: healthkit
role: symbol
role_heading: Global Variable
path: healthkit/hkmetadatakeyaudioexposurelevel
---

# HKMetadataKeyAudioExposureLevel

The audio level associated with an audio event.

## Declaration

```swift
let HKMetadataKeyAudioExposureLevel: String
```

## Discussion

Discussion Use this key on audio exposure events. It takes an HKQuantity containing the audio level measured in decibelAWeightedSoundPressureLevel() units.