Loud noise shortens life?

OK, I am reading an article for my Basic Aspects of Aging Course and I came across a paragraph that strikes me as odd. I’m not sure what to make of it.

In his letter to the editor of the Los Angeles Times, Hack (1999) reported on a 1993 study by Meecham and Shaw conducted near the Los Angeles International Airport. The results indicated that living near that airport was related to a two-year loss in life expectancy among seniors 74 years of age and older. The negative factors that contributed to a decline in life expectancy were excessive noise levels and air pollution. As worries of the Leisure World residents concerning the noise and pollution associated with the airport grew, so did the success of pro-city activists.

I was not aware that loud noise could decrease life expectancy, unless you go deaf from the loud noise, and then get hit by a car because you couldn’t hear it coming.

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