Kiakpechinsignificant cause of hearing loss. Instead, it was shown that chronic exposure to moderately high levels of environmental noise led to hearing loss. Cardiovascular complaints also emerged from among those with prolonged exposure to industrial noise above 70 dBA. In fact, over a single eight-hour period, it was shown that participants experienced a rise in blood pressure thus indicating noise pollution contributes to human stress levels. If this was not alarming enough,also
noted was an increase in the incidence of heart disease.
The findings from various noise studies had the effect of changing the perspectives of many of the world's govemments. Whereas noise had been considered a 'nuisance' rather than an environmental problem, laws were made to protect citizens against it.
Write NO MORE THAN ONE WORD for each answer.
1. Excessive has consistently posed a significant environmental concem for people.
2. Experts correctly predicted a of water and quietness in the 21st century.
3. Noise pollution seems to be a bigger problem in countries.
4. Noises that enter the human are perceived to be louder than they are.
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