Sound pollution, noise pollution, and health: community parameters.
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Noise is responsible for cochlear and general damages. Hearing loss and tinnitus greatly depend on sound intensity and duration. Short-duration sound of sufficient intensity (gunshot or explosion) will not be described because they are not currently encountered in our normal urban environment. Sound levels of less than 75 d (A) are unlikely to cause permanent hearing loss, while sound levels of about 85 d (A) with exposures of 8 h per day will produce permanent hearing loss after many years. Popular and largely amplified music is today one of the most dangerous causes of noise induced hearing loss. The intensity of noises (airport, highway) responsible for stress and general consequences (cardiovascular) is generally lower. Individual noise sensibility depends on several factors. Strategies to prevent damage from sound exposure should include the use of individual hearing protection devices, education programs beginning with school-age children, consumer guidance, increased product noise labelling, and hearing conservation programs for occupational settings.
Noise, defined as any unwanted or undesirable sound, is a known environmental pollutant and health hazard. Sound levels during the entire surgical procedures were measured in the operation theatres (OTs) of a general hospital in Delhi, using a sound level meter, B & K 2209, on the dB(A) scale. The sound levels were found to be higher as compared to the recommended international standands. The noise was contributed mainly by doors, trolleys, equipment and alarms and the incessant conversation among the operation theatre (OT) staff. It is well documented that noise is stressful eliciting changes in the autonomic nervous system, impairing mental faculties and producing masking that could affect the staff and the conscious patient alike, leading to decreased work performance and increased anxiety respectively. Better acoustic designing and maintenance of equipment together with an increased awareness of the OT staff towards this vital factor of work environment may effectively reduce the noise pollution in OTs.
The menace of noise is a by-product of civilization and its hazards are well known. Noise levels were measured in Karachi, at different places and at different times of the night and day, using an Amplaid noise meter. The leg for Karachi came to 80 dB (A), the General Noise Index x (G.N.I.) to 460, and the noise pollution level (N.P.L.) to 99 dB (A). These values are significantly higher (P less than 0.01) than the available international data. The sources of noise production were indentified as, the road traffic, human activity, industrial and civil works, mechanical and engineering workshops. The most noticeable sources of noise pollution in Karachi, are the autorickshaws, trail motor bikes and the fag horns of public transport (JPMA 39-62, 1989).
Noise has ill effects tagged to its definition; yet, even though pollution of the air, water and land in metropolitan India has attracted some recognition, little attention has been paid to noise pollution and its effects. Noise acts upon the body very much as other stresses do and so its effects are far reaching affecting not just hearing but other body functions too. This article tries to generate some interest and controversies on the subject to initiate more action on noise pollution.
AIM OF THE STUDY: The study deals with the relationship between socioeconomic status and the uneven distribution of noise pollution in residential areas. Based on the social indicators education, occupation, income and an index of socioeconomic status, the study investigates whether people of lower socioeconomic status are more likely to live in busier streets and to be more affected by traffic and noise pollution than others. MATERIAL: The German Federal Health Survey (Bundesgesundheitssurvey, BGS) is a representative survey of the health status of the adult population in Germany. The representative sample in question reflects the opinions of 6,644 individuals aged between 18 and 79 years who were asked to fill in a standardised questionnaire between autumn 1997 and spring 1999. RESULTS: People of lower socioeconomic status are more likely to live in busy to extremely busy main roads and through roads. They feel significantly more often affected by traffic noise pollution. People of higher socioeconomic status are more likely to live in quiet environments. Essentially, all four social indicators reflect the social gradient of noise pollution, but their impact is differently weighted. CONCLUSION: Noise pollution in environments is unevenly distributed, with people of lower socioeconomic status suffering more than others. In view of the increased social burden and assumed vulnerability experienced by lower socioeconomic groups, environmental objectives for protection from noise pollution should be developed which ensure a socially just distribution of environmental noise pollution in addition to avoiding danger to health.
The methodological methods for a reduction of the noise pollution in the urban areas, mainly, can be advised in 8 operative points: 1) reduction of the source's noise; 2) control of the traffic; 3) planning of the urban and regional development; 4) building's shelter against the noise; 5) compensation's and incentivation's interventions for the exposed people; 6) controls activity and restaining of the noise's sources; 7) scientific research; 8) health education. For executive motivations we must, necessarily, divide the intervention turned to a reduction of the noise's emissions caused by fixed source compared to the noise's emissions determined by motor or railway traffic (mobile sources). This operative criteria have been utilized recently (1988) from Italian Department of Ecology for a bill. The controls of fixed source are made by Public Health Services of U.S.L. (Local Sanitary Unit) assisted, in case, by multiarea country's districts. The regulations of traffic can be took in consideration, in short time, only in more simple problems, as the setting up of pedestrian island or the suspensions of the heavy traffic, etc. The traffic's regulation must care same general data: the halved of traffic's flow in same rilevation's point, involve a reduction of only 3 dBA of the sound pressure level previously measured; if the percentage of heavy traffic is higher than 10% of the traffic's flow, the first intervention must be the no thorough fare to heavy lorries. In general, then, the best way for the resolution of vehicular noise pollution is the noisy emission's control of the single vehicle, because only the regulation of traffic's flow doesn't suffice to realise a enough reduction of noise pollution. For the resolution of more complex problems is necessary a preliminary stage to study and to plan those before to can carry out a typology of intervention. This necessity is, of course, more expensive in time and money; in fact, the solution of the problem can be the building of a efficient subway network completed by car parks in the terminal stations. In alternation at this draft, we can pointed out, also, same compromise resolutions like the appoint areas to limited traffic in the town or the break of continuity of the bus-line in the town. The compensation or the incentivation to make defence works against noise is a very expensive way and, moreover, they don't solve the problem for all exposed people in a future.(ABSTRACT TRUNCATED AT 400 WORDS)
In order to evaluate the extent of annoyance caused by air pollution and noise immissions, we measured the values in the small town of Uznach, which is crossed by a narrow and sloped street with a heavy traffic. The results revealed that noise immissions exceed the "alarm-value" of 70 dB(A) and that pollution of the air is situated in the range of limit values.
A study was carried out to determine levels and factors that influence noise pollution from small-scale industries (SSIs) in Dar es Salaam City Tanzania. Two sites for wood- and metalworks industries were investigated. Both sites exhibited equivalent noise levels higher than 90.0 dBA, the permissible exposure level limit for occupational noise. At a woodworks SSI, noise levels were found to correlate well with machine-use age, wood-feed speed, and wood-cut depth. Additionally, noise emanating from both types of SSIs was found to influence the level of environmental noise in the neighborhood of the SSIs. One woodworks SSI was found to have a circle of influence of about 140 m. The study concluded that SSIs present a serious source of environmental noise pollution in their neighborhoods. Noise pollution from SSIs is greatly influenced by the type of SSIs and the activities they carry out, the type and age of machines they use, their location relative to residential areas in their vicinity, and in-house noise control measures.
A proposal for a solution to reduce stress and anxiety in the hospital setting by combining the problems of excess noise in a hospital setting with the efficacy of music therapy is supported through an analysis of research in the field of noise, hospital noise pollution, and music medicine. Included in this overview are articles describing the effects of noise on health, the problems of noise pollution in the health care setting, and the benefits of replacing noise with music to reduce heart rate, blood pressure, breathing rate, emotional anxiety, and pain. By combining these areas of research, the authors propose the establishment of a department assigned to (1) control the amount of noise in a hospital and (2) provide a center of music therapy for all individuals in the hospital setting, including in-patients, out-patients, doctors, and staff. Due to the large specificity of these areas, this unifying source, or "Department of Sound," is suggested to aid in thoroughly addressing and combining these two concepts most effectively.
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This study focuses on noise pollution in the Botanical Garden in Curitiba, Paraná, Brazil. Equivalent noise levels (Leq) were measured at 21 points throughout the park, and interviews were conducted with park visitors. Some 47.6% of the measurement sites presented Leq levels over 65dB(A), considered by preventive medicine as the maximum tolerable exposure level without risk of health impairment, and 90.5% of the sites failed to comply with Municipal Ordinance 8,583, setting 55dB(A) as the maximum noise emission level for green areas. The results of interviews with visitors showed that 78% visit the park at least twice a week and that 96% come for physical activity. During their activities in the Botanical Garden, 24% of interviewees identified noise pollution as a source of annoyance, as compared to 22% who complained of insufficient park security.