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.
All strange noises you hear in your speakers are caused by 1 of 2 problems: Ground Loops and EMI (ElectroMagnetic Interference). Commonly referred to as âengine noisesâ, these 2 problems are responsible for ALL âengine noiseâ problems. very common after an amplifier has been added to a stereo system.