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with white noise.White noise refers to a noise that has a mixture of all the audible（听得见的)frequencies that the human ear can detect.It is a combination of all the frequencies ofsound played at once.It can cover the sounds of other noises because of its variousfrequencies,leading many people to experience its calming effects.Studies have found that listening to white noise positively affects sleep.For example,people living in a high-noise area of New York City fell asleep.faster and spent more oftheir time in bed asleep while listening to white noise.In another study,listening to whitenoise through headphones improved sleep quality for seriously ill patients in a loud hospitalroom.However,more research is needed to confirm whether the characteristics of whitenoise itself improve sleep or whether the sound primarily helps by covering backgroundnoise.However,a recent analysis of multiple studies looking at white noise's effect on sleephas produced mixed results.The researchers are doubtful about the quality of existingevidence and conclude that further research is necessary in order to widely recommend whitenoise as a sleep aid.They also note that in some instances,white noise can disturb aperson's sleep and may affect their hearing.Despite that,researchers are still optimistic that the steady hum of white noise mightreduce a sleeper's sensitivity to unpredictable noises from the environment,such astransportation sounds like cars and planes,which are considered a major contributor to poorsleep.32.Why does white noise have calming effects?A.It can absorb other noises.B.It can help people sleep better.C.It can be detected by human ears.D.It can cover the sounds of other noises.33.How does the author explain the benefits of white noise?A.By giving examples.B.By telling stories.C.By asking questions.D.By making comparisons.34.Which statement may researchers agree with according to the last two paragraphs?A.White noise should be strongly recommended as a sleep aid.B.Harmful effects of white noise have become a major concern.C.Poor sleep will make people sensitive to the unpredictable noises.D.More researches are needed to confirm the effect of white noise on sleep.35.Which of the following can be a suitable.title for the text?A.How Does White Noise Work?B.Is White Noise Harmful in Any Way?C.Does White Noise Help You Sleep?D.What Are the Benefits of White Noise?十校高二英语试题卷一6（共10页）