Sensory Overload-

Everyone can get frustrated at noise or lights. People with autism are especially sensitive to it. Your mind has the ability to filter out an extraneous sound or a slight flicker to a light. However, a person with autism may not. It may be a trigger for them and it may not be obvious to neuro-typical person.

I have read experiences with kids where they are screaming and crying and it turns out they are upset about a machine in the other room or the flicker of lights. Most often, I think that they are responding to internal stimuli or that it is a behavioral response. They are trying to gain or avoid something. yet it is something to consider.

People with autism may not have a mind that can filter out what is important. They put as much attention to the electric fan going as the sound of your voice. The chair is as important as your face. They take in sensory input and cannot prioritize.

That is why they cannot identify social cues.