---
title: "init(envelope:)"
framework: phase
role: symbol
role_heading: Initializer
path: "phase/phaseenvelopedistancemodelparameters/init(envelope:)"
---

# init(envelope:)

Creates the distance model parameters with an envelope.

## Declaration

```swift
init(envelope: PHASEEnvelope)
```

## Parameters

- `envelope`: The envelope that shapes sound dissipation over distance.