Collocations for noticeable - adj.

be
become

extremely, fairly, very, etc.
especially, particularly
barely, hardly
immediately
The smell was immediately noticeable when you walked in the front door.

easily

in
These changes are more noticeable in women than in men.

to
This may not be noticeable to people from outside New York.

Noticeable is used with these nouns:
change, difference, drop, effect, exception, feature, hiss, impact, improvement, lack, limp