[Marxism] noise and worker's hearts
schaffer at optonline.net
Thu Nov 24 09:59:05 MST 2005
Statistically small but interesting study. note that 70 db (decibels) is
approximately the level of a vacuum cleaner or noisy traffic.
see charts for where 70 db sits in the spectrum of sound levels:
critique of the ISHA standard:
Published Nature Online: 24 November 2005; | doi:10.1038/news0051121-9
Noise raises risk of heart attack
High sound levels at home or in the workplace increase heart danger.
Chronic exposure to noise raises the risk of suffering a heart attack,
according to a survey of more than 4,000 German heart patients. The
health experts who carried out the study argue that the current legal
noise-exposure threshold may not be sufficient to protect against this
Living or working in a noisy environment raises the odds of suffering a
heart attack by around 50%, reports a team led by Stefan Willich of the
Charité Medical Centre in Berlin. They made the discovery after quizzing
heart-attack patients in Berlin hospitals. They then looked at 'noise
maps' and data from workplaces to quantify how noisy the patients' lives
Instead, Willich suggests, constant exposure to noise might raise levels
of stress hormones in those working in loud factories or living next to
busy roads, which can ultimately affect heart health.
The risk to industrial workers occurs at around 70 decibels, below the
85-decibel threshold recommended by the US Occupational Safety and
Health Administration to protect workers' hearing, the researchers point
out in the European Heart Journal . More research should be done to
see whether this limit should be reduced to safeguard hearts as well as
ears, says Willich.
Most surprisingly of all, the results show that women living in noisy
homes are more than three times more likely than other women to suffer a
heart attack. "We were absolutely astonished," says Willich. "This may
be because women generally tend to spend more time in the home. But
there may be biological differences."
1. Willich S. N., Wegscheider K., Stallman M. & Keil T. Eur.
Heart J., doi:10.1093/eurheartj/ehi658 (2005).
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