Here's why:
* Linking verbs connect the subject to a noun or adjective that renames or describes the subject. Common linking verbs include "be" (is, am, are, was, were), "seem," "appear," "become," "feel," "look," "smell," "taste," and "sound."
* "Noisy" is an adjective that describes a quality of something.
Example:
* Incorrect: The party is noisy. (Here, "is" is a linking verb, but "noisy" is not a noun or adjective describing the party.)
* Correct: The party is loud. (Here, "loud" is an adjective describing the party.)
Instead of "noisy," you could use a linking verb and a noun or adjective to describe the sound:
* The party sounds loud.
* The party is a noisy affair.