My favorite is RF filters on the C band (also known as bandpass filters). I prefer the 3.4 bandpass filters to ensure anything below that doesn’t make my teeth hurt. I hear the constant whine from the frequency and it causes a sensory overload. I can’t properly hear or understand what people are saying because of the constant whine really fills my hearing and that’s all I can focus on. If you’ve ever tried to have a conversation while someone scrapes nails on chalkboard, that’s what it’s like