Originally Posted by EMBFlyer

Somewhere near where the boom attaches to the headset (near the on/off switches), there should be a very small screw. That's the gain adjustment. Use a jeweler's screwdriver to adjust. Make very small turns as it is very sensitive. I recommend maybe plugging it into the jumpseat jack and use a company headset while you make the adjustment. It's a fine line between too much wind noise and not being able to pick up your voice.

On a side note, how do you find it with cutting out the noise? I bought a pair used on eBay and it didn't really dampen out any sound. Do you wear earplugs? Maybe I just need to replace the ear seals on it.