You might try playing some upbeat music to give him something else to think about when your hubby is due home, or make this time his spray bath time as a wet bird is often quiet until dry. Bird is feeling out where to fit in to your family, my hubby has some hearing loss (this happened before the birds) and our Cockatoo's always seem to scream when he comes home, it is something he has great trouble tolerating. Cockatoo flock calls can put a Grey sound of any kind into background noise, my dear hubby loves me enough to go to another room until the birds quiet down rather than asking me to not have them. Love makes adjustments to keep each other happy and if Grey has to be the adjustment you make do it sooner rather than later. If you and hubby are willing to work on extinguishing the sound it can be done by not reacting, they love attention enough to motivate them into making sounds you will respond to. An alternative would be to move the bird to another room away from hubby when hubby needs some quiet (sleep cage) done in a positive way not as a punishment.