Misophonia — "a newly recognized condition that remains little studied and poorly understood."

A newly recognized condition... or an old irritability with a name that helps irritable people feel less irritated by their own characteristic of being terribly irritated by other people?

Many people can be driven to distraction by certain small sounds that do not seem to bother others — gum chewing, footsteps, humming. But sufferers of misophonia... [are believed to have something that] is hard-wired, like right- or left-handedness, and is probably not an auditory disorder but a “physiological abnormality” that resides in brain structures activated by processed sound....

Misophonia (“dislike of sound”) is sometimes confused with hyperacusis, in which sound is perceived as abnormally loud or physically painful. But Dr. Johnson says they are not the same. “These people like sound, the louder the better,” she said of misophonia patients. “The sounds they object to are soft, hardly audible sounds.” One patient is driven crazy by her beloved dog licking its paws. Another can’t bear the pop of the plosive “p” in ordinary conversation.