IPA: /ˈnɔɪ.zi.nəs/
KK: /ˈnɔɪzɪnəs/
The quality or state of making a lot of noise or sounds that are loud and disruptive.
The noisiness of the construction site made it hard to concentrate on my work.
Noisiness → It is formed from "noise" (from Old French *noise*, meaning sound or clamor) and "-iness" (meaning the quality of being). The word "noisiness" refers to the quality of being noisy or producing sound.
Think of the word 'noise' which describes sound, and remember that 'noisiness' means the quality of producing sound.