I haven't tried but I will this evening to see if any changes. I ask
Google to "help me relax" and then a random nature sound will come up.
Sometimes it only plays for a hour other times, it refreshes after an
hour until I ask it to stop playing.
The only way I can get white noise is to ask Google to help me relax.
Then it turns off after and hour, sometimes restarting for another hour
but not always.