I had a problem where I could not hear my Squad mates but they could hear me. I could hear some Local VOIP but it was intermittent.
I resolved this issue after noticing my Sound Card settings had somehow changed to Surround Sound 5.1 rather than Stereo. I guess that the Squad sound engine puts the comms in the center or rear channels. Oddly I could hear the transmit beeps, just not what was being said.
It was a very frustrating few days but I'm happy now.
I have a Sound Blaster AE-5 Soundcard and I think that a recent Windows update interfered with my soundcard settings somehow.
Hope this helps!
Dave the WARHAMSTER