Other than that can only makes guesses - like Paranormal Radio Interference (PRI), or some sort of radio interference from other electrical items in your home.
Not meaning to be flippant, but I don't really have a clue either - Sorry!
OnePlus 5 review
Alice Saey's mesmerising animation for Dutch singer Mark Lotterman
iPad Pro 10.5in (2017) review
Comment booster votre iPhone ?