After waiting for 4 days for a Panasonic engineer to call me back about the buzzing on the set, here are the main things he said. 1...ALL plasma's buzz, every plasma on the planet buzzes/hums. 2...HE said that you will get a increased buzz volume if you hang your plasma on the wall using the wall bracket. 3...It depends on what your wall is made of as to how loud the buzzing volume is. 4...DO NOT use any sound proofing foam/dampening sheets...I quote..'It would be like putting your plasma in a sealed plastic bag' IT would burn out/damage the set. 5...Sound proof your wall. I asked him about the brochure where it says..'Silence engineering & Quiet technology' He said....I didnt write that so I cant comment on it. He needs to take the plasma away to check the buzz levels. I'll post more as I get updated.