> ## Documentation Index
> Fetch the complete documentation index at: https://docs.daily.co/llms.txt
> Use this file to discover all available pages before exploring further.

# startRemoteParticipantsAudioLevelObserver()

> Starts polling the audio levels of all remote participants in the call.

`startRemoteParticipantsAudioLevelObserver(interval?)`

Once started, a [`remote-participants-audio-level`](/reference/react-native/events/media-events#remote-participants-audio-level) event is emitted at the specified interval containing a map of participant IDs to audio level values.

## Parameters

<ParamField body="interval" type="number" default="100">
  Polling interval in milliseconds. Minimum is 100ms. Defaults to 100ms.
</ParamField>

## Return value

Returns `Promise<void>`.

## Example

```javascript theme={null}
// Emit remote-participants-audio-level every 500ms
call.startRemoteParticipantsAudioLevelObserver(500);

call.on('remote-participants-audio-level', ({ participantsAudioLevel }) => {
  for (const [participantId, level] of Object.entries(participantsAudioLevel)) {
    console.log(`${participantId}: ${level}`);
  }
});
```

## See also

<CardGroup>
  <Card title="Methods" icon="code" iconType="solid">
    * [stopRemoteParticipantsAudioLevelObserver()](/reference/react-native/instance-methods/stop-remote-participants-audio-level-observer)
    * [isRemoteParticipantsAudioLevelObserverRunning()](/reference/react-native/instance-methods/is-remote-participants-audio-level-observer-running)
    * [getRemoteParticipantsAudioLevel()](/reference/react-native/instance-methods/get-remote-participants-audio-level)
    * [startLocalAudioLevelObserver()](/reference/react-native/instance-methods/start-local-audio-level-observer)
  </Card>

  <Card title="Events" icon="bolt" iconType="solid">
    * [remote-participants-audio-level](/reference/react-native/events/media-events#remote-participants-audio-level)
  </Card>

  <Card title="Guides" icon="book-open" iconType="solid">
    * [Audio and video](/docs/daily-js/guides/audio-video)
  </Card>
</CardGroup>