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# hapticIntensity

The strength of a haptic event.

```
static let hapticIntensity: CHHapticEvent.ParameterID
```

## Discussion

This parameter maps to the haptic pattern’s amplitude or strength. Its value ranges from 0.0 (weak) to 1.0 (strong). Think of intensity as the volume of a haptic pattern, indicating how impactful it feels in the user’s hand. The higher the haptic intensity, the stronger the resulting haptic.

![Short blue bars show the intensity of a transient haptic event on the left, and long orange bars show a continuous haptic event on the right.](images/com.apple.corehaptics/media-3242667@2x.png)

To change the intensity dynamically, use [`hapticIntensityControl`](/documentation/CoreHaptics/CHHapticDynamicParameter/ID/hapticIntensityControl).

---

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