I just got my first headset and I'm having a few problems. I used to run a small microphone on my desk and just used some regular headphones when I played and everything worked great, but now that I've set up my headset I've noticed that in-game volume is reduced quite a bit whenever I talk on my mic, and it lasts for almost a whole second after I stop talking.

I've tried playing around with volume settings on Windows 7, in TF2, and tried leafing through the headset manual (it's a really simple Windows Lifechat LX-3000, nothing fancy at all, just the bare minimum) and I can't find anything. What software do you think is causing this problem and what can I do to fix it? I'd rather have all sounds be the same volume all the time. Could it be a hardware issue built into the headset?

Thanks in advance!