Hello, I bought a pair of Sony WH-1000XM2 headphones. They are working fine on my desktop pc or smartphone. When they are connected to the dell laptop with cable or bluetooth (doesn't matter, it's the same) and the music starts playing there is a static noise. But if the headphones are connected with cable and turned OFF, there is no hissing. I suppose it's because the headphones have it's own amplifier. Maybe the problem is in the Dell Audio. I need those headphones ON because of the noise cancelling. Thanks in advance.