[ubuntu] Low Microphone input

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http://ubuntuforums.org – I've recently installed Ubuntu 12.10, and I've found that although the microphone is working, I have to put it really near my mouth in order to get proper sound. And there is like a noise in the background constantly. I have Windows in the other partition, and It works perfectly, no noise, and I can put the microphone like 4 or 5 cm away from mouth and it receives sound perfectly, so there is a problem with my Ubuntu settings. What shall I do? (Hardware)