An invisible, tasteless and odorless pollutant may be affecting your health, and no, you're not inhaling it. Turns out noise pollution may increase your risk of heart problems. New research released Wednesday in the journal Occupational and Environmental Medicine shows that those who work in noisy environments have a higher prevalence of chest pain, heart attacks, heart disease and high blood pressure .
Researchers at the University of British Columbia in Vancouver, Canada, found that workers in noisy professions (defined as a volume at which they had to raise their voices to be heard), had two to three times the likelihood of having a heart problem compared to those who worked in quieter places. The study, which included more than 6,000 survey participants, found that 3.6 percent of workers...
Screaming sirens. Rumbling trucks. Thundering turbojets. Modern life is loud, yet too much sound is bad not only for hearing but for overall health. Peace and quiet, it turns out, are as good for you as a healthy diet and exercise.
Noise (noise is unwanted sound), whether a loud burst or a steady irritation, is linked to everything from insomnia to irreversible hearing loss, higher stress levels and high blood pressure. These medical after-effects may creep up silently, but their consequences can be just as alarming as the wailing of an ambulance. Throbbing low-frequency noise, like that coming from air conditioners, factories or diesel trucks, is thought to be especially aggravating.
Why is noise such a headache? Thank your nervous system, whose senses help you survive. Healthy ears pick up everything from crackling leaves, which may signal a stealthy predator, to the wail of a newborn, the rumble of thunder or the roar of a hungry lion. And they never stop. Even during sleep, sudden, loud or menacing sounds will trip an inner alarm that tells the brain to hustle the body into fight or flight.
Next, streaming stress hormones raise blood pressure and make muscles contract. In the short term, we're more alert, maybe shocked from slumber. That leaves us cranky and forgetful. Over time, steady over-stimulation can cause chronic high blood pressure, muscle tension, upset stomach and insomnia - changes linked to serious health problems, from depression to a higher risk of stroke and heart disease.
Finally, people don't get used to noise. The nervous system takes each new sound fresh. What's more, it can't tell a noisy lawnmower from an angry volcano. Thus, short of moving to the far side of the moon, the healthiest solution is to avoid or block as much noise as possible.
La réduction du bruit est mesurée en ITS ou Indice de Transmission du Son. Il varie de 0 à 100 – 100 représente une insonorisation complète alors que 0 indique qu’il n’existe aucune barrière entre la source sonore et vous. Exemple: si votre fenêtre est ouverte, tout le son entendu est de 0 ITS. Si la fenêtre est fermée, vous entendez à présent le son à travers une barrière (vitre). Le vitre a un ITS qui correspond à la quantité de son qu’il a réduit.