I go 4 fingers down from the collar on the front, and just under the front collar impression on the backside of the shirt. everyones fingers are different so I measured mine and the 4 fingers measure 3.5. I also use my left hand to guage where to put left chest logos.
Grey noise then, has a sound frequency that, if translated to a light frequency, would roughly be the color grey. Grey noise is a random sound that is distinguishable from other types of sound because it sounds the same, to the human ear, at all frequencies.
There is a fuzzy static noise along with a high pitch, and a low pitch whistle sounding thing. I didn't realize it was my ear till I plugged it with my finger and hear it even clearer. It's louder then it was a half hour... Source(s): static noise ear: https://tinyurl.im/e/static-noise-in-my-ear.