Adjective : a noticeable lack of interest. ,a book that is noticeable for its vivid historical background.    From Dictionary.com. 

"There has been a noticeable spike in the 'noticeability' of us," Chelmis said.    From Wordnik.com.  [CITIZEN-TIMES.com - News] Reference

Steele's obvious "noticeability" puts more weight on his shoulders although none would ever admit it.    From Wordnik.com.  [AlterNet.org Main RSS Feed] Reference

Black would be ten times better, but i guess the color is for noticeability.    From Wordnik.com.  [AutoSpies.com News] Reference

It's worth noting that according to benchmarks published by PC Magazine, Apple's hardware really IS better than that sold by the other PC makers; if you run Windows on an Intel Mac, you will get better performance, just on the cusp of noticeability, than on (say) a Dell with the same specs, because the components are good quality and the machine is well-engineered.    From Wordnik.com.  [Planet Atheism] Reference