That google bar on your android's home screen, not google chrome, there's
a small microphone icon.
A small microphone icon in the lower right lets you activate Alexa manually.
Users of Google Chrome may have noticed
a small microphone icon in the right hand corner of Google's search box (now on Google search as well).
Not exact matches
Other
smaller tweaks include an updated Cortana search box
microphone icon, and it's the same
icon you'll see on Cortana across devices.
Smaller children can tap the
microphone icon and search with their voice — results will vary depending on annunciation, naturally.
Fire TV's offering also has a button that none of the other set - top box remotes have — one with a
microphone icon that activates the
small mic just above it.