[header] How to not scare a cat [title] Avoid loud noises. [step] Cats are frightened by loud noises such as thunderstorms, the vacuum cleaner, hair dryers, power tools and loud voices. When possible, avoid causing a lot of noise or disruptions that will frighten the cat. 
[substeps] For example, have a friend or family member vacuum in a neighboring room while petting the cat. Over time, you can open the door or bring the vacuum cleaner closer to help desensitize the cat and ease their fears.