---
title: headphoneAudioExposure
framework: healthkit
role: symbol
role_heading: Type Property
path: healthkit/hkquantitytypeidentifier/headphoneaudioexposure
---

# headphoneAudioExposure

A quantity sample type that measures audio exposure from headphones.

## Declaration

```swift
static let headphoneAudioExposure: HKQuantityTypeIdentifier
```

## Discussion

Discussion These samples use sound pressure units (described in HKUnit). You create these units using the decibelAWeightedSoundPressureLevel() method. They measure discrete values of the equivalent continuous sound pressure level, described in HKQuantityAggregationStyle.discreteEquivalentContinuousLevel. Samples can be automatically detected by an iPhone or Apple Watch.

## See Also

### Hearing

- [environmentalAudioExposure](healthkit/hkquantitytypeidentifier/environmentalaudioexposure.md)
- [environmentalAudioExposureEvent](healthkit/hkcategorytypeidentifier/environmentalaudioexposureevent.md)
- [headphoneAudioExposureEvent](healthkit/hkcategorytypeidentifier/headphoneaudioexposureevent.md)
- [audioExposureEvent](healthkit/hkcategorytypeidentifier/audioexposureevent.md)