Compressed wood table bumping noise

Hi there, I've got a compressed wood desk from IKEA, model name is Malm. And I usually type on a computer keyboard a lot on it, but for every character I type the table makes a very annoying bumping sound, like a drum. I guess its something related to the vibrations of my typing on the table's top plank. My question is, hoe do I stop this sound? I've tried putting a carpet bellow the table and even a thin cork panel on top, but it didn't stop the sound, which makes me believe its because of the top plank, that makes the sound resonate for some how. Here is the table model, for reference - MALM Desk - birch veneer - IKEA (http://www.ikea.com/us/en/catalog/products/30214151/) Can anyone help me please?