Open the Google app or Google Assistant app
Tap your profile picture or initial
Tap Settings
Tap Google Assistant
Tap Assistant voice and sounds
Select a voice from the available options
Wait for the selection to save automatically
On some devices, open the Google Home app
Tap your profile picture or initial
Tap Assistant settings
Tap Assistant voice and sounds
Choose a different voice option
If the voice does not change, update the Google app and try again
If needed, restart your device after changing the setting