Why does my Audi 80 make a high-pitched noise when I accelerate?

I recently noticed that my Audi 80 makes a loud, high-pitched noise every time I press on the gas pedal. It disappears once I'm at a constant speed. What could be causing this? Is it something I should be concerned about?

This high-pitched noise may be due to a worn or loose belt in your engine. It's important to have this checked out by a mechanic as soon as possible to prevent any further damage and costly repairs.

Another possible cause for this noise could be a faulty or dirty air filter. Try replacing the air filter and see if the noise goes away. If it persists, take it to a mechanic for further inspection.