For some people, music is no fun at all. About 4% of the population is what scientists call “amusic”. People who are amusic are born without the ability to enjoy musical notes. Amusic people often cannot tell the differences between two songs. As a result, songs sound like noise to an amusic. Many amuics compare the sound of music to pieces of metal hitting each other. Life can be hard for amusics. In fact, most people cannot understand what it feels like being amusic. Just going to a restaurant or a shopping center can be uncomfortable or even painful. That is why many amusics have to stay away from places where there is music. However, this can result in social loneliness. “I used to hate parties,” says Margaret, a seventy-year-old woman who only recently discovered that she was amusic. By studying people like Margaret, scientists are finally learning how to identify (辨别) this unusual condition. Scientists say that the brains of amusics are different for those of people who can enjoy music. The difference is complex (复杂的), and it is not connected with poor hearing. Amusics can understand other non-musical sounds well. They also have no problems understanding common speech. Scientists compare amusics to people who just can’t see certain colors. Many amusics are happy when their condition is finally diagnosed (诊断). For years, Margaret felt embarrassed about her problem music. Now she knows that she is not alone. That makes it easier for her to explain. “When people invite me to a concert, I just say ‘No, thanks. I’m amusic.’” says Margret.