Yep I had a whine after I had my timing belt redone. It was only audible at idle, but really reduced the quality of the car.
When I complained, the junior Honda mechanic told me "don't worry, it'll go quiet after a few thousand kay's."
I wasn't convinced, but didn't want to ruin my relationship with the Honda dealer/service centre, so i believed them and waited.

6 months later, I had enough. Took it back to Honda and said fix it. They booked it in, tightened (or loosened) the timing belt, and the whine went away.

It sounded beautiful again - i.e. the car is inaudible inside, at idle.
(...'xcept when the aircon fans kick in...)