Using the search predictions and history as cues, if you're doing something that has a voice command would work too. Like if you start typing out "weather near"

Using the search predictions and history as cues, if you're doing something that has a voice command would work too. Like if you start typing out "weather near" have a tooltip of the voice button with a caption like "Try with voice?" that you can tap and it would then turn on the mic and give you a karaoke style prompt with blanks for you to fill.