One autistic child may love the vacuum cleaner, and another will fear it. Some are attracted to the sound of flowing, splashing water and will spend hours flushing the toilet, while others may wet their pants in panic because the flush sounds like the roar of Niagara falls. I know what it is like to feel my heart race when a car horn honks in the middle of the night. I have hyperacute senses and fear response that may be more like those a prey-species animal than of most humans. I have observed that there is a great similarity between certain chanting and praying rituals and the rocking of an autistic child.
Autism is a neurological disorder.
A child is born with it. That's definitely not true. The severity of the autism varies with the severity of the immaturity. Some of the studies have found extra circuits in parts of the brain involved with visual thinking. And autistic brains tend to be slightly enlarged.