Why is my Laptop's battery charger is making a loud buzzing noise?

Hi, my laptop's battery charger has been making this loud buzzing noise constantly when it's plugged into my laptop. Also strangely enough, when I plug in my headphones I can hear the buzzing noise from them as well. When I unplug the battery charger's cord all the noise stops. What is the problem and what can I do solve it?
Asked Aug 30, 2012
because its it has a little fan that cools down the monitor and it makes that annoying sound my computer does that too.
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Answered Aug 30, 2012

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