measure the Spatial coefficient acoustic comfort in the metropolitan of Ahvaz

Abstract
Environmental pollution over the past three decades has attracted worldwide attention, in the meantime, the issue of noise pollution in cities as widespread problem, but poses greater countries respectively. However, in the age of innovation and equip them to become cities aspects of emerging technologies, is part of the well-being of citizens, but today the car of a significant contribution from the comfort and safety of its citizens is denied. Noise pollution is a growing problem in urban ecosystems that discomfort with the voice of citizens, as loss-inducing factor for mental health, mental and physical well known. Noise is the one of the most important environmental pollutants in urban areas, which is the development of technology. After various aspects of life in today's mechanized world, in various forms are considered disruptive acoustic comfort. Rapid Urbanization and the changing nature of urban functions, population density, changing residential patterns, transport, industry and urban rise ... and rise to great challenges with regard to noise pollution is relatively emerging. Acoustic comfort generally have two sources of industrial and non-industrial city. Royal believes that the most important factors in making urban acoustic comfort by streets and highways within the city include traffic volume, traffic composition, speed of movement, Flooring and slope of the street, intensity and wind direction, away from buildings and streets is. However, the scale of the world's most prominent sources of urban noise include road traffic, railways, construction, industry, noise from construction activities are. However, from the perspective of urban planning, requirements and considerations urban location and type of establishment of the most important factors affecting comfort or noise pollution is sound. In fact, the city consists of a set of land use types and their relationships are. In today's metropolises, in addition to multiple electronic products (at home, at work, in the streets, public places, etc.) industries, workshops, shopping centers, streets, sports centers and all construction activities and noise as a source of jobs pollution and discomfort are sound. The land use planning in order to provide the spatial distribution pattern of urban vocalizations operations is a top priority for city planners. traffic problems of environmental issues, especially noise pollution suffered.

Method:
The dominant approach to research, analyze location. According to the dominant approach, banks provide research data and user separation, the first step of this article. including the local arteries and arterial primarily secondary (second stage) was carried out and then the map acoustic comfort (phase III) of the composition of the maps using Fuzzy Overlay analysis and operator SUM, for urban areas was obtained Ahvaz. The analysis in this part of the sound (dB) predictable per user, based on existing standards.








Discussion:
Commotion and noise is an integral part of modern life and modern overnight. Our ancestors lived in a more quiet environments and exposed to the sounds were softer. Spatial analysis in this study are considered in three dimensions.
 The first dimension, analyzing the results in urban areas. The following map was prepared to measure acoustic comfort segregated areas, where the results of the analysis indicate that the urban areas, in the District 5 district, zone 2 and zone 4 and zone two military police the area ratio (0/827), the district 1 area three, four regional areas 1 and 4, district 4 area, five, six regional district 1, district 4 area seven, area 1 and area industrial by a factor of (0/720) region eight-noise ratio is very high compared to other areas and low acoustic comfort in these areas respectively.

 The second dimension, spatial analysis in the metropolitan area of Ahvaz. In Zone Two (0/782) and the six (0/767) than other urban areas, the average coefficient of noise pollution is more and these areas are less acoustic comfort. The main reasons for the high level of noise pollution in these areas can be pointed to the presence of contaminants user and businesses.


 After the third, topical analysis. Among the selected indicators involved in noise pollution, heavy industry, passenger terminals, workshops annoying, multiple workshops, the military-disciplinary and cross the road network (motorways and main roads), the most important pollutants are jobs that foreclose it is comfort. Such as such as: railways in the region of six, Ahvaz airport in the region three, there are numerous workshops in six regions, including (workshop stonework in the region, six, and eight in the welding workshop, etc.), Takhti stadium in four and seven revolution in the region, a regional market (including fruit market, electronics market, etc.), the center of the military police in the area, Karoon industrial area in region seven, a large number of industries such heavy (Flour Khuzestan, Golriz Company, Inc. Covenant Nasr, pipe factory, etc.) in the region of six, highway crossing zones two and six and seven and eight regions and passenger terminals located at the end of the street revolution the six-pointed Khorramshahr in the region .










Conclusions and Solutions :
Research findings indicate that, 4-2 District (Area 4 in Region 2) by a factor of place (0/879) and 1-6 area (Area 1 in 6) by a factor of (0/807) of the lowest comfort 1-5 have audio as well as areas (area 1 in 5) and 5-4 (zone 5 in region 4) had the highest coefficient of acoustic comfort. Also, findings have shown that the establishment of incompatible land uses in the metropolitan area of the main reasons for high pollution in these areas has been poor audio sound and comfort.
In order to enhance the acoustic comfort factor in Ahvaz Metropolis is suggested that you first: Accounting and transfer of units and workshops disturb the six metropolitan region of Ahwaz (welding, turning, rough and repair shops) out of town, Second: the implementation of the Plan annoying jobs (collection of hawkers especially from central and transfer to a suitable place), Third, the development of green spaces in metropolitan areas of Ahvaz using two and six plant species suitable environmental conditions areas, Fourth, reform of network traffic engineering in order to avoid the heavy traffic and increase user and create facilities such as public parking in the area and finally, the fifth Decentralization of downtown and core services in the areas of second and third degree.