<!--
{
  "availability" : [
    "iOS: 7.0.0 -",
    "iPadOS: 7.0.0 -",
    "macCatalyst: 13.1.0 -",
    "macOS: -",
    "tvOS: 9.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 2.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "AVFAudio",
  "identifier" : "/documentation/AVFAudio/AVAudioSession/PolarPattern/subcardioid",
  "metadataVersion" : "0.1.0",
  "role" : "Type Property",
  "symbol" : {
    "kind" : "Type Property",
    "modules" : [
      "AVFAudio"
    ],
    "preciseIdentifier" : "c:@AVAudioSessionPolarPatternSubcardioid"
  },
  "title" : "subcardioid"
}
-->

# subcardioid

A data source that’s most sensitive to sound from the direction of the data source and is less sensitive to sound from the opposite direction.

```
static let subcardioid: AVAudioSession.PolarPattern
```

## Discussion

The subcardioid pattern picks up a sound from a wide radius in the front and in the back.

![The subcardioid pattern picks up more sound from the direction of the data source than from the rear. ](images/com.apple.avfaudio/media-3039130@2x.png)

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)