Possibly defective - Rifleman ACH Hearing Protection Earmuffs

When I 1st received the "Rifleman RF-ACH Hearing Protection" I wore them in the house, I did not experience any issues, they did pick up allot of static noise from my computer and traffic out side. 1st time to the range was a different story, they had a terrible voice reverb, it picked up the sound of my breathing that was overpowering and then this high frequency squealing was it for me, 10 minutes at the range and done with these.