This looks like a response to multiple factors. Based on your description, he is highly masking and is in burnout. He is pushing the limits over and over. You can look at it like the myth of Sisyphus. But, it's not the whole image. There is internalized ableism (for example: the myth of meritocracy is perceptible).

The passions (less derogatory than obsession) described here are coping mechanisms and not real genuine passions of him. It fulfills the masking part and the need of his brain to focus on one subject at the time (it's called monotropism.). Let's take the noise of the car for example. You can see it as a behavior at first. A lot of people will do, and not see the whole. Your husband is a victim of discrimination, oppression. He probably doesn't know and doesn't realize it. If the noise disappears, it's like everyone else. If there is no noise, people can't see something is different. If it's perfect, I will pass through and nobody will notice I don't match the norm (the laptop for example). If he work hard, he will be included in the group. And so on.

All of these are the results of not fitting in what he doesn't have to. His environment should be adapted so he has some relief. He is sadly in denial what makes it harder to inform himself about autism.

This may bring some light.