Couldn't you just get a normal vibrator and buzz her on the genital region with no penetration?
I think this has been the best advice so far!
When I was growing up, mu mum bred Siamese cats for a while. When they are in season, there is nothing quite like that sound. They scream. Neighbours could probably hear it.
To quieten the female cat in season, Mum would put her in an open-ended box and cover it with a light blanket or sheet. This really did help to calm the cat down (also helped us to be able to sleep at night!), it can even shorten the season.
Hope this helps.