The Dictate feature is available with the Learning Tools Add-in for OneNote 2016 and 2013. For best results you’ll need a good microphone (a headset will work best), and a quiet place without background noise.
If you haven’t yet, install Learning Tools for OneNote.
Open OneNote, then select Learning Tools > Dictate.
When you see the highlighted piece of text "Listening..." or a red circle appears over the Dictate button, begin speaking loudly and clearly.
To insert punctuation, say its name:
inserts line break
starts new paragraph
exclamation point or exclamation mark
When you're done talking, select the Dictate button again to stop the recording.