A:
All openings on that case are covered with a small amount of mesh fabric similar to Tyvek to improve its resistance to dust and wind-blown rain. This can cause a small reduction in audio fidelity, but it shouldn't be a major difference. If you are having major issues with call audio, just give us a call at (800) 208-5996 between 9am and 6pm Monday through Thursday or between 9am and 5pm on Friday (CST) and we'll see what we can do for you.