Yesterday I played with headphones using the headphone jack on the Switch and I immediately noticed static noise coming from them. It's a bit distracting. My Nvidia Shield does also produce static noise. All my other devices don't. I wonder if it's in any way related to Nvidia seeing that Switch and Shield use Nvidia hardware. Does your Switch also produce static noise? If not, try with regular in-ear headphones and see if the noise becomes noticable.