Psychologists now believe that noise has a considerable effect on people's attitudes and behavior. Experiments have proved that in noisy situations (even temporary ones), people would have more irritability (躁易怒) and less cooperation. In more permanent noisy situations, many people cannot work hard, and they suffer from severe anxiety as well as other psychological problems. Some researchers, who study various aspects of effect of noise in people's mental life, maintain that noise, either temporary noise or permanent noise, often destroy creativity and activity by disturbing people's emotion and make them more irritable and hard to cooperate. However, psychologists distinguish between "sound" and "noise". "Sound" is measured physically in decibels (分贝). "Noise" cannot be measured in the same way because it refers to the psychological effect of sound and its level of "intensity" depends on the situation. Thus, for passengers at an airport who expect to hear airplanes taking off and landing, there may be a lot of sound, but not much noise (that is, they are not bothered by the noise). By contrast, if you are at a concert and two people behind you are whispering, you feel they are talking noisily even if there is not much sound. You notice the noise because it affects you psychologically. Both sound and noise can have negative effects, but what is most important is if the person has control over the sound. People walking down the street with earphones, listening to music that they enjoy, are receiving a lot of decibels of sound, but they are probably happy hearing sounds which they control. On the other hand, people in the street without earphones must tolerate a lot of noise which they have no control over. It is noise pollution that we need to control in order to help people live more happily.
单选题
"Sound", as defined by the psychologist, ______.
【正确答案】
D
【答案解析】[解析] 细节题。依据是第二段的第二句：“Sound”is measured physically in decibels(分贝)。声音可以用机器测量，而噪音则不行，所以正确答案是D，同时排除A。文章第二段第一句就提到：However, psychologists distinguish between "sound" and "noise". ，即声音和噪音是有区别的，排除C。选项B文中未提及。
单选题
People waiting at an airport ______.
【正确答案】
B
【答案解析】[解析] 细节题。依据是第二段的第四句：Thus, for passengers at an airport…，there may be a lot of sound, but not much noise。对于那些飞机场待机乘客，听到飞机起飞和降落的声音，虽然很吵，但他们不认为那是噪音(即他们没有被这种声音打扰)，与选项B一致。选项A不正确，文中没有提到机场乘客喜欢听飞机起落声；文中未提及C选项内容即他们能够很容易区分声音和噪音；选项D与文章内容相矛盾．
单选题
People enjoy listening to music, ______.
【正确答案】
A
【答案解析】[解析] 细节题。依据是最后一段倒数第三句：People…，listening to music that they enjoy, are receiving a lot of decibels of sound, but they are probably happy hearing sounds which they control．可以看出，尽管音乐的分贝量很大，但人们仍乐于听他们喜欢的音乐。与选项A一致，选项B不是人们喜欢听音乐的原因；选项C、D文中未提及。
单选题
It can be interred from the passage that we need to control noise pollution if ______.
【正确答案】
A
【答案解析】[解析] 推断题。依据是最后一句：It is noise pollution that we need to control in order to help people live more happily, live more happily和选项A中的stay both psychologically and physically healthy相对应。选项B、C、D中的暴躁易怒、难以合作、感到焦虑等都是第一段提到的噪音对人们的不良影响，属于细节，不是我们要控制噪音污染的主要目的。