I just happen to discover that Cortana provides a convenient way to capture Notes in OneNote.
So, how do I add a Quick Note into OneNote with Cortana ?
To trigger the recording, simply say “Note” and wait. When prompted “what’s your note ?”, dictate your note.
It will create a new note (with a blank title) in your “Quick notes” section, with an audio file (.WAV format) and a written transcript of your speech.
Therefore, it’s very usefull when you are driving (hand free) !
Reference : Office Blog