I thought, or should I say, only noticed it when I was steering whilst in motion. But it made a simular noise when stationary and turning the steering wheel. Checked the Power steering fluid level and that seems ok. I was convinced it was the brakes up until this afternoon when it did it stationary.... :duh:
Looking at this and your first post I'd say it was your power steering pump working if there is a whine as well. I bet it's worse when stationary on full lock. If it is this take a look at your PAS fluid, if it''s more grey than red might be worth getting it changed.