Fact · Dictation on Windows

Microsoft says Voice Isolation needs a quick one-time setup so that Voice access can learn to recognize your voice.

Checked against its source on October 16, 2026

In the source's own words

“Voice Isolation requires a quick one-time setup so Voice access can learn to recognize your voice.”

Improve speech recognition with Voice access, Microsoft, Microsoft Support, 2026, Section Set up Voice Isolation.

What it measures: Voice Isolation is one of three speech recognition options in Voice access. It filters out background speakers and noise, and the setup is the only voice-learning step Microsoft describes for Voice access.
What it does not show: Microsoft does not say how much the setup improves recognition for any particular speaker, and we found no independent test of it.