Tuesday, October 21, 2014

The Effects of Population Density and Noise





     Within a densely populated area health concerns are ever increasing as urban and ambient noise increases; thus, stress, anxiety, and tension are the underlying currents of many densely populated environments (Moudon, 2009).  This can become an even greater health concern as people struggle for territory, privacy, and personal space in such conditions.  In an effort to mitigate the stressful effects of crowding, many communities are working to bring natures healing qualities to urban lifestyles and are seeking alternatives to offset the effects of noise on individuals.
The Concepts of Territoriality, Privacy, and Personal Space
     Territoriality.  According to Augustin (2009), territoriality is the act of defending or controlling a specific area or space.  The best way to accomplish this task is by way of personalization; thus helping to preserve one’s sense of ownership.  Adding boundaries (e.g., fences, doors, or even a carpet), changing colors, or variations in the architectural design of building foundations (e.g., ceiling height, elevation, etc.) is a way to identify who owns what, for “[p]eople feel more powerful in their own territory” (Augustin, 2009, p. 83).  “Empirical evidence,” Veitch (2008) tells us, “shows that buildings influence our health and well-being and that choices made in their design, construction, and operation can lead to benefit or harm” (p. 286).  
     Privacy.  Both audio and visual privacy are important; however, Augustin (2009) indicates the ability to block out the voices of others is more beneficial than not seeing them.  Although there is no doubt that the most important aspect of privacy is the ability to choose if and when one will interact with others, or not (Augustin, 2009).  There are times when a few close friends can be comforting, but humans need the restorative benefits of privacy from time to time.  Privacy can be achieved through different means depending on one’s culture.  People from Eastern cultures avoid eye contact with others and devote a large amount of mental energy on ignoring the goings on around them; thus they need a smaller area of privacy (Augustin, 2009).  While other cultures may need larger areas of privacy and use techniques such as not talking to each other, or they may use physical barriers for privacy (e.g., walls, and doors).  Regardless of the style of privacy (i.e., mental or physical barriers) without the restorative benefits of its solace, there is evidence of cardiovascular and mental health issues with the overexposure of noise and other forms of crowding (Veitch, 2008).     
     Personal Space.  One’s culture most often depicts appropriate personal space; that personal invisible bubble of distance that people keep between themselves and others.  The size of which, according to Augustin (2009), “varies from situation to situation as well as from culture to culture, and it is used to communicate important relationship information” (p. 120).  Less personal space is required between people who are familiar with each other (e.g., spouse or sibling) than with those who may be friends or business acquaintances.  The size of one’s personal space can also be determined by many other factors; the number of others in the area, one’s physical condition, height, age, or gender.  For example “men generally have larger personal spaces than women in the same situation… [and] respond more negatively to personal space invasions than women” (Augustin, 2009, p. 78).  Personal space invasions can create intense anxiety, stress, and social awkwardness, thus many people avoid eye contact, change positions (for an easy exit), or include more familiar faces as ways to alleviate the tensions of personal space issues. 
Concepts Under Denser Populations
     Several studies have shown that normal function under a denser population is negatively affected.  Paulus, Annis, Seta, Schkade, & Matthews (1976), also found “…that crowding can produce negative psychological effects on humans” (p. 248).  With an inability to recognize and set personal boundaries, struggles over territory increase and privacy is lost because of the lack of personal space in the denser population.  Paulus, et. al., (1976) and Steg (2013) agree that stimulus overload and arousal negatively affect task performance, thus, demanding environmental conditions lead to a greater need for privacy and a reduction in social interaction.  However, crowding in urban settings remain high; “75% of the population in developed countries lives in dense urban areas” (Habitat, 2001 as restated by van den Berg, Hartig, & Staats, 2007).  Therefore, it is increasingly more important that psychological and individual territorial boundaries be established so that people have a healthier physiological attitude and can prepare themselves for reduced personal space and effective privacy options.  As has been established, people are better able to mitigate negative situations when he or she is aware of what is ahead (Augustin, 2013).  
Natures Effect on Urban Environments
     In the often over-crowded and demanding urban setting elements of nature bring a sense of comfort, health, and well-being (Steg, 2013).  Research reflects that residents who have contact with “green spaces and elements” have more psychological restoration; in effect a buffer from the noise, fear, and stressors of urban life (Steg, 2013, p. 100).  Several studies completed by Ulrich (1984) & Ulrich, et. al., (1991), states Veitch (2008), reflect that post-surgery patients with views of nature report less pain and quicker recovery times than those without views of nature elements.  Human desire for contact with nature may even be innate; a reach for that evolutionary element in which the human race evolved (Orians & Heerwagen, 1992; & Kaplan & Kaplan, 1989 as restated by van den Berg, et. al., 2007).  Regardless, the psychological and physical restorative benefits that people perceive from natural environments are real.  For those who live in urban areas zoos, parks, and gardens designed to emulate natural settings are the choice places to escape from the stresses of civilization.  Such manmade natural environments provide locations that are not only beautiful but relatively easy to access and are perceived as safe (van den Berg, et. al., 2007).  Even today there are cities that implement green urban designs (e.g., “…green roofs, tree-lined parking lots, inner communal gardens, green building facades…”) and they are expected to increase as populations become even denser; a way to provide urban residents’ the restorative green environment needed to maintain optimal homeostasis (van den Berg, et. al., 2007, p. 91-92).  
Noise and its Effect on Individuals
     Sound is one of the seven senses in which humans use to communicate with his or her world; however, chronic exposure to noise can disrupt reading acquisition, cause memory impairment, and physiological stress responses in children as-well-as adverse effects on the cardiovascular health of adults too (Moudon, 2009, & Veitch, 2008).  In densely populated areas, ambient sounds are difficult to regulate; thus the EPA has delegated the establishment and regulation of noise to many different agencies: airport noise to the Federal Aviation Administration; vehicular traffic (the leading source of noise pollution according to Moudon (2009)) to the US Department of Transportation and other state-level counterparts (Moudon, 2009).  That said, businesses and individuals do have other ways in which to mitigate some of the negative effects of urban noise in the home and workplace.     
Reducing Noise
     Natural barriers.  An effective method of noise reduction is the use of natural barriers (e.g., plants, shrubs, and trees).  Ropuš, Alar, and Runje (2013) report that placing plants close to the noise source absorbs a greater amount of the acoustical energy of the sound and scatters it in diverse directions including the atmosphere.  The complexity of the plants height, leaves, and branch structure influences the scattering of those acoustical waves and the amount of sound that escapes.  Thus, deciduous plants are more effective at noise reduction in the summer than in the winter (Ropuš, et. al., 2013).  However, the use of natural barriers indoors can serve a dual purpose, to reduce noise and provide a restorative environment.
     Soundscaping.  Because humans cannot turn off their auditory system, per se, they can mitigate the damaging sounds within their environment to provide a more healing and restorative atmosphere (Augustin, 2009).  Sound waves bounce off surfaces until its energy dissipates.  Music has the ability to energize, relax, or intrigue; it distracts from the external noise keeping the brain alert and focused, it also influences emotional response by its tone and rhythm.  White noise, often referred to as background noise (e.g., fan, radio static, moving water, etc.), can aid in concentration and mood by making irritating or distracting noise more difficult to hear.  In addition to white noise, adding soft surfaces (e.g., upholstered furniture, pillows, etc.) and wall hangings (e.g., paintings and curtains) to a room can disburse sound waves even more and make the space even quieter (Augustin, 2009). 
Conclusion
     Territoriality, privacy, and personal space are key to well-being in a densely populated environment.  Eliminating the negative physiological effects of crowding can be as easy as mitigating the abundance of noise caused by overcrowding and adding restorative places for people to visit.  Why… because plants and other environmental green spaces have a way of healing the psychological stresses that crowding creates.  
           


 

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