---
title: "relative(dBSPL:)"
framework: realitykit
role: symbol
role_heading: Type Method
path: "realitykit/audioresource/calibration/relative(dbspl:)"
---

# relative(dBSPL:)

Relative adjustment of the resource from the default level of the audio output hardware.

## Declaration

```swift
static func relative(dBSPL: Audio.Decibel) -> AudioResource.Calibration
```