Some people cannot tolerate certain noises. Think, for example, of chewing, slurping, or humming. When they hear one of these sounds, the hairs on the back of their neck stand up straight. You really can't help it. This is why the sound of people eating is driving you crazy.
Often you can't do anything about it, but somehow you get tremendously irritated. Fortunately, there is a scientific explanation for this allergy. There is such a thing as misophonia. Literally, this means "hatred of sound. You experience feelings of anger or disgust as soon as you hear certain sounds. Often these sounds are produced by people. Often they are mouth and throat sounds. So it's not exceptional if you experience this, but there is still the question of where exactly this violent reaction to the sound comes from.
A 2017 study found that changes in the frontal lobe were visible in people with misophonia when they were told a specific sound. In addition, people with misophonia had a higher heart rate and sweated more when hearing sounds that triggered emotions. In addition, brain scans showed that certain sounds (such as chewing) caused more activity in the insular cortex in people with misophonia. This part of the brain is related to emotions. Also, this part of the brain plays a role in integrating signals coming from outside. Finally, people with misophonia also showed more activity in the ventromedial prefrontal cortex of the brain. All in all, it can be concluded that the brains of people with misophonia have more difficulty processing specific, triggering sounds. So there is really nothing you can do about this yourself.