Simple and Clear:
* The difference in her mood was noticeable.
* There was a noticeable improvement in his performance.
* The repair left a noticeable scar on the wall.
More Descriptive:
* The noticeable increase in traffic made it difficult to get home.
* Her new haircut was noticeable and stylish.
* The noticeable tension in the room was palpable.
Figurative Language:
* The sunset painted the sky with noticeable hues of orange and purple.
* Her smile was noticeable even from across the room.
* The noticeable changes in the environment were a sign of the coming winter.
Specific:
* The noticeable bulge in his pocket suggested he had something interesting hidden inside.
* The noticeable lack of communication between the team members was a concern.
* The noticeable difference in price between the two products was significant.
The best sentence for you will depend on the specific context and what you want to emphasize.