Effects of Noise Pollution to our health?
- ■■■■■■■■Lv 41 decade agoFavorite Answer
"Principal noise health effects are both health and behavioral in nature. The following discussion refers to sound levels that are present within 30 to 150 meters from a moderately busy highway.
The mechanism for chronic exposure to noise leading to hearing loss is well established. The elevated sound levels cause trauma to the cochlear structure in the inner ear, which gives rise to irreversible hearing loss. The pinna (visible portion of the human ear) combined with the middle ear amplifies sound levels by a factor of 20 when sound reaches the inner ear. In Rosen's seminal work on serious health effects regarding hearing loss and coronary artery disease, one of his findings derived from tracking Maaban tribesmen, who were insignificantly exposed to transportation or industrial noise. This population was systematically compared by cohort group to a typical U.S. population. The findings proved that aging is an almost insignificant cause of hearing loss, which instead is associated with chronic exposure to moderately high levels of environmental noise.
High noise levels can contribute to cardiovascular effects and exposure to moderately high (e.g. above 70 dBA) levels during a single eight hour period causes a statistical rise in blood pressure of five to ten mmHg; a clear and measurable increase in stress; and vasoconstriction leading to the increased blood pressure noted above as well as to increased incidence of coronary artery disease.
Though it pales in comparison to the health effects noted above, noise pollution constitutes a significant factor of annoyance and distraction in modern artificial environments:
1. The meaning listeners attribute to the sound influences annoyance, so that, if listeners dislike the noise content, they are annoyed. What is music to one is noise to another.
2. If the sound causes activity interference, noise is more likely to annoy (for example, sleep disturbance)
3. If listeners feel they can control the noise source, the less likely the noise will be annoying.
4. If listeners believe that the noise is subject to third-party control, including police, but control has failed, they are more annoyed.
5. The inherent unpleasantness of the sound causes annoyance.
6. Contextual sound. If the sound is appropriate for the activity it is in context. If one is at a race track the noise is in context and the psychological effects are absent. If one is at an outdoor picnic the race track noise will produce adverse psychological and physical effects.
A 2005 study by Spanish researchers found that in urban areas households are willing to pay approximately four euros per decibel per year for noise reduction."
- Anonymous1 decade ago
CAN YOU SAY THAT AGAIN?????