Living in the city, you can't escape traffic noise. But it's not just a ____1____. If you're over 65, the noise might be a risk to your health, too—by increasing your risk of a stroke. That's according to a study in the European Heart Journal.

The researchers studied over 51,000 Danish city ____2____ for about a decade. And they mapped out noise levels at each person's home over time, using a noise calculating program. After accounting for other ____3____, like smoking history, diet and air pollution, they found that for the over-65 ____4____, the risk of stroke rose 27 percent higher for every 10 decibels of noise exposure. The baseline was the volume of a normal conversation.

This study doesn't prove that road noise causes strokes. But previous studies have linked noise to heart attacks and higher blood pressure, too—possibly due to increased stress and ____5____. For older people who already have trouble sleeping, the researchers say that extra tossing and turning could be the cause. So don’t just worry about the fumes if you're relocating to a busy city street—keep in mind your sound health, too.
【视听版科学小组荣誉出品】
nuisance dwellers variables set sleep disturbance
住在城市里总避不开交通噪音，而这些噪音只会惹人讨厌。假如你已经超过65岁，这种噪音可能会损害你的健康——它会增加你中风的概率。这是《欧洲心脏杂志》上的一项研究报道。 研究人员在过去10年分析了5万1千多名丹麦城市居民的情况。他们用噪音计算程序在地图上标出每个人家里不同时间的噪音度。在考虑了其他诸如抽烟史、食谱和空气污染等多种变量之后，他们发现对于65岁以上的群体，曝噪每提高10分贝，这些人的中风几率就上升27%，而10分贝是正常谈话音量的底线。 此项研究并未证明马路噪音引起中风。但以前的研究显示，噪音和心脏病以及高血压也有关系——它可能会增加人们压力以及干扰睡眠。研究人员表示，对那些已经睡不好觉的老人来说，不必要的辗转反侧可能是影响睡眠的原因。因此在一个繁忙城市街道上安家落户的时候，不要只考虑空气中的烟尘了——要记住全面健康也很重要哦。（sound双关了^-^）