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.
Yeah exactly. In percussion, it's common to refer to short or nonexistent resonance decay as a dry sound (usually considering environment). An example of a dry sound would be hitting a solid piece of wood outsife in a field. A wet sound would be long resonance, like playing a concert bass drum in a basketball gym.