annoys, a noise

Annoys or annoys is the third person singular ( he, she, it ) form of "annoy", meaning to irritate or get on the nerves of--
Stop it. That annoys people.
He annoys everyone when he hums.

A noise or a noise ( rhymes with annoys ) means one sound--
Did you hear a noise?
He heard a noise downstairs, and went to see what it was.

Now that you know that, you can say--
"It annoys him if anyone makes a noise while he is watching TV."

Note--"annoy" is a verb ( action word )--
I annoy, you annoy, he annoys, we are all annoying.
That annoyed him yesterday.
The noun ( thing or idea ) from of "annoy" is "annoyance"--
The least annoyance spoils his whole day.
Note # 2--"noise" is a noun ( thing or idea )--
They made a noise.
They made some noises.