What I did not include in my original synopsis was the tactile nature of the condition. When walking on a "crunchy" carpet, there's a definite feel to the walk, similar to walking on damp, packed sand or on packed snow.
There is a condition related to crunchy/noisy carpet face yarn referred to as "scroop". Scroop occurs due to friction between fibers/yarn as they rub against each other. While excessive heat during yarn manufacturing can cause damage to the fiber that results in scroop, the condition is more...