***

title: denoise
slug: /reference/typescript/relay/call/denoise
description: Start noise reduction on a call.
max-toc-depth: 3
---------------------

For a complete index of all SignalWire documentation pages, fetch https://signalwire.com/docs/llms.txt

[denoise-stop]: /docs/server-sdks/reference/typescript/relay/call/denoise-stop

[calling-call-denoise]: /docs/server-sdks/reference/typescript/relay/call#events

[call-events]: /docs/server-sdks/reference/typescript/relay/call#events

Start noise reduction on the call. Filters background noise from the audio
to improve clarity.

<Info>
  Use [`denoiseStop()`][denoise-stop] to disable noise reduction.
</Info>

<Info>
  This method emits [`calling.call.denoise`][calling-call-denoise] events. See [Call Events][call-events] for payload details.
</Info>

## **Parameters**

None.

## **Returns**

`Promise<Record<string, unknown>>` -- Server response confirming noise reduction has started.

## **Example**

```typescript {12}
import { RelayClient } from '@signalwire/sdk';

const client = new RelayClient({
  project: process.env.SIGNALWIRE_PROJECT_ID!,
  token: process.env.SIGNALWIRE_TOKEN!,
  contexts: ['default']
});

client.onCall(async (call) => {
  await call.answer();

  const result = await call.denoise();
  console.log(`Noise reduction started: ${JSON.stringify(result)}`);

  const action = await call.play([{ type: 'tts', text: 'Noise reduction is now active.' }]);
  await action.wait();
});

await client.run();
```