I thought I was alone but there is so many comments I wonder how much people is there and if it’s really random or if there is common sources like some stress, airpods or some kind of psychoacoustic event. I have like 3 different frequencies and it « exploded » in a stressful event at work. I always thought it was music all day with AirPods but it might be stress actually because everytime I’m tired and stressed it’s unbearable. A nightmare that we learn to live with. I often ask myself what the sound would look like if demodulated and de-pitched if that makes sense. It might seem weird but a voice modulated at a very high frequency and pitch might look like those kind of noises or I am wrong ?