Emistry

My Virtuoso SE headset, the sound keep turning low and high every few seconds. By the way I am referring to the sound that I heard from the headset, not the volume setting are changed. Just the sound is frequency changing from loud to low and low to loud again, repeat every few short intervals. It doesn't happen when I test with normal speaker or soundbar. Only happen to the headset. I am using the dongle and wireless mode. I have also updated the firmware. is there anyway to fix that?