题型：阅读选择 题类：模拟题 难易度：困难
浙江省宁波市2019届普通高中英语保送生招生综合素质测试试卷
It's every parent's worst nightmare there's a fire in the house, the alarms are beeping, but the children are sleeping on. Now scientists have found a better way to rouse slumbering youngsters. Researchers in the US have discovered that playing a child a recording of his mother's voice is about three times more likely to wake him up than a traditional alarm.
Writing in the Journal of Pediatrics, Smith and colleagues report how they compared the effects of four different smoke alarms on 176 children aged between 5 and 12 years old, none of whom had hearing difficulties or were taking any medication that affected their sleep. While one alarm featured a high-pitched beep the sort of commonly found in households the other three featured the voice of the child's mother calling either the child's name, giving instructions such as: "Wake up! Leave the room! ", or both. Each child slept in a lab-based room that resembled a real bedroom.
The results show that vocal alarms appear to be more effective than high-pitched beeps. About 90% of children woke for a voice alarm compared with just over 53% for the traditional alarm.
“High pitched beeping alarms don't wake up children well at all under about 12 years of age, "said Dr Gary Smith, a co-author of the research from the Nationwide Children's hospital in Ohio, although
he said at present it is not known why. He said it was important to look at developing better alarms.
Prof Niamh Nic Daeid, director of the Leverhulme Research Centre for Forensic Science at the University of Dundee, said the research found a human voice combined with a low-frequency pulsing tone was far more effective in waking up children than a traditional high-pitched alarm. She also noted that more work was needed to explore whether other familiar sounds, such as a dog barking, might also prove effective in rousing children.
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