I recently installed a Blackvue dash cam model 650S where the video works fine but intermittently I have been getting lots of noise on sound recordings. I replaced the device once and I still have the same problem intermittently. I'm thinking that it may be electromagnetic interference as it sounds like static. I wired the power up to the connector that is underneath the microphone panel in the roof. When I plug the same dash cam into my ICE vehicle or in my house I don't get the static. Looking online, I don't see folks talking about such a problem and many have this same Blackvue dash cam (650S). In the link below is a video with sound where you can listen to the crackling. It's odd as it seems to be intermittent... goes away for a while and then comes back. Blackvue crackling sound - Google Drive Any thoughts on the cause? Thanks in advance for any insight.