# identifier A prediction label that’s one of the classifications a sound classifier’s underlying model defines. ``` var identifier: String { get } ``` ## Discussion An example `identifier` might be a string like `laughter` or `applause`*.* The sound classifier’s underlying model defines the possible string values, which are typically technical names that you don’t directly present in your app’s user interface. --- Copyright © 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)