i sound like a tiger

please can someone help me....i use teamspeak to play mohaa online with my clan buddies,at start after logging onto our server everything is fine all sounds given and recieved are great but then my buddies tell me after about 15 to 20 minutes i start to sound like a tiger and noone can hear what im saying,any help as ive tried everything i can think of would be most appreciated.

[Solitaire]

please give us some details
what OS do you use
what sound card how up to date are the drivers
what type of internet connection do you have
do you use a NAT device
are you the only person that experiences this in your clan