Loud powder... often called ice ;-)
Lots of that around this morning in S VT.
What to do?
Think about what you might do to stop sliding down the hill with your skis side-ways to the direction of travel, and making all that racket!
What will allow you to follow the ski tips across the fall line.
The edges need to engage. roll the ankles, bend the knees, counter the upper body to face down hill, and keep those hands pointing to the end of your next turn! It takes a soft feel for just how much "position" effort is right. There is a lot of "pressure" sensation on slick surfaces.
Then with the same soft feel, make a smooth turn trying to keep following your turn, tips to tails.
The "loud sound" will diminish by many decibels. Your sense of control will amplify ten fold, and you will be in command of your direction and velocity. (keep turning and following the tips, and you will end up going up hill! Even on ice! (if you get your edges working)
A wider trail helps with this effort, ..... worth seeking out. the methods apply to short turns too, just a bit more critical of timing.
I skied a connector trail today that was blue ice from entrance to exit. Not more than a couple of snow patches at the very edges. The rope was pulled after that. No place for "intermediates", and I certainly would not have wanted to pull a loaded sled down THAT! Gravity being so persistent and all..;-)