The 強調する／ストレス 原因（となる）d by living 近づく a busy road: Noise of traffic can raise 危険 of 一打／打撃
Traffic noise may 増加する the 危険 of a 一打／打撃, a 熟考する／考慮する has 設立する.
The noisiest roads are linked to the highest 危険 of having a 一打／打撃 の中で the middle-老年の and older people.
Roar: Cars 列ing on a busy road in Chiswick, a 居住の area of London
研究員s say there is a low 危険 to young people, but road noise could account for one in five 一打／打撃s の中で pensioners.
The first 熟考する／考慮する to 調査／捜査する the link 設立する that for every ten decibels more noise, the 危険 of a 一打／打撃 増加するd by 14 per cent. The 危険 増加するd by 27 per cent for those 老年の 65 and over.
When the noise gets above 60dB, the 危険 of 一打／打撃 goes higher still, によれば a 報告（する）／憶測 in the European Heart 定期刊行物.
The Danish 熟考する／考慮する 調査／捜査するd 51,485 volunteers 老年の between 50 and 64 for around ten years. A total of 1,881 had a 一打／打撃.
The 関係者s were 概算の to be exposed to noise levels between 40dB and 82dB.
In a major city, typical noise levels can 普通の／平均（する） 50-55dB compared with 60-70 for 居住（者）s living 近づく an airport.
研究員 Dr Mette S?rensen said the 一打／打撃s were probably 原因（となる）d by noise 乱すing sleep, which in turn raised 強調する／ストレス hormones and 血 圧力.
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