The level of confidence the speech recognizer has in its recognition of the speech transcribed for the segment.
- iOS 10.0+
- macOS 10.15+
- Mac Catalyst 13.0+
This property reflects the overall confidence in the recognition of the entire phrase. The value is
0 if there was no recognition, and it is closer to
1 when there is a high certainty that a transcription matches the user's speech exactly. For example, a confidence value of
0 represents a very high confidence level, and is more likely to be correct than a transcription with a confidence value of