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.
Ambient Background Sounds and Sound Effects. 1  Generally, as with music, describe over the original audio only if there is important information to be conveyed. Determine whether the description of the ambient background sounds or sound effects is key to understanding the scene.