Have had these for about ten years now, and still work great !! Now, however, have loud buzzing noise. Noise increases/decreases with volume control. I have them away from any magnets, satellite boxes, other elec. equip. but to no avail.Do I need to take these to an expert and have an electronic component on the "board" inside the headsets replaced?? (resistor, transistor, diode, etc.)Thanks, appreciate ALL replies......Wayne.......