in game sound stops

hi,

i need some help with this problem,

during online play or campaign the sound suddenly stops after getting i high pitched static noise,

i loose mouse control and my keyboard disconnects.....sometimes the next scene loads in and the sound returns but its way out of sync.

i have tried three alternatives soundcards,  and the onboard card but it keeps doing variations of the above.

i am using the latest drivers and firmware on all three soundcards, and am running battlefield 3 on recommended nvidia settings

can anyone help or is there a patch incoming.....bacause as of now i cannot play for any length of time