Main Article Content
In soundscape ecology, different acoustic indices have been developed to describe the acoustic environment, mainly in natural areas. Avian species are among the sources of natural sounds that positively influence the human perception of a natural environment. However, the acoustic environment is rather complex due to the contemporary presence of different sources, leading to the difficult task of discriminating these sources in audio data. This task is even more essential in medium-large urban parks, as they are often exposed to road traffic noise produced by surrounding roads and to anthropogenic sounds due to people using the park for different purposes. Such non-natural sounds can deteriorate the perceived soundscape quality of the park and, therefore, reduce its potential restorative function. The aim of this preliminary study is to evaluate the potential of sound ecology indicators for discriminating the different types of sounds present in medium-large urban parks. For this purpose, two environmental settings were considered: a large urban park surrounded by busy roads and a shrub-dominated area, the latter of which was used as a reference site for natural areas. The two sonic environments were characterized by the presence of different anthropogenic noises, especially in the urban park, and sounds from avian species. Sound ecology indicators, or their combinations, could help identify the urban park areas with higher biophonic activities and, therefore, the areas that offer greater relief and restorative value. Such information can be helpful for improving the use of parks by directing users towards areas with features more conducive to their enjoyment and consistent with their expectations.
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 Fearn E, Redford KH. State of the wild 2008-2009: a global portrait of wildlife, wildlands, and oceans. Island Press, Washington, D.C. 2008.
 Schafer RM. The tuning of the world. Knopf. New York;1977.
 Lercher P, Schulte FB. The relevance of soundscape research to the assessment of noise annoyance at the community level. Proceedings of the 8th International congress on noise as a public health problem, Rotterdam, The Netherlands, 29 June-3 July 2003.
 Schulte FB, Dubois D. Recent advances in soundscape research. Acta Acust United Ac. 2006; 92(6):v-viii.
 Nilsson ME, Berglund B. Soundscape quality in suburban green areas and city parks. Acta Acust United Ac. 2006;92:903-911.
 Maller C, Townsend M, Pryor A, Brown P, Leger L. Healthy nature healthy people: “contact with nature” as an upstream health promotion intervention for populations. Health Promot Int. 2006;21:45-54.
 Hartig T, Mang M, Evans GW. Restorative effects of natural environment experiences. Environ Behav 1991;23:3-26.
 Alvarsson JJ, Wiens S, Nilsson ME. Stress recovery during exposure to nature sound and environmental noise. Int J Environ Res Public Health. 2010;7:1036-1046.
 Watts G, Pheasant R, Horoshenkov K. Tranquil spaces in a metropolitan area. Proceedings of the 20th International Congress on Acoustics; 2010 Aug 23-27; Sydney, Australia. New York: Curran Associates, Inc.;2011.
 European Parliament. Directive 2002/49/EC of the European parliament and of the council of 25 June 2002 Relating to the assessment and management of environmental noise. OJEU [Internet]. 2002 [cited 2020 7 Oct] Available from: https://eur-lex.europa.eu/eli/dir/2002/49/oj.
 Ge J, Hokao K. Research on the sound environment of urban open space from the viewpoint of soundscape-a case study of Saga forest park, Japan. Acta Acust United Ac. 2004;90(3):555-563.
 Payne SR. Are perceived soundscapes within urban parks restorative? J Acoust Soc Am. 2008;123(5):3809.
 Nilsson ME, Alvarsson, J, Rådsten EM, Bolin K. Auditory masking of wanted and unwanted sounds in a city park. Noise Control Eng J. 2010;58:524-531.
 Tse MS, Chau CK, Choy YS, Tsui WK, Chan CN, Tang SK. Perception of urban park soundscape. J Acoust Soc Am. 2012;131:2762-2771.
 Szeremeta B, Zannin PHT. Analysis and evaluation of soundscapes in public parks through interviews and measurement of noise. Sci Total Environ. 2009;407:6143-6149.
 Irvine KN, Devine WP, Payne SR, Fuller RA, Painter B, Gaston KJ. Green space, soundscape and urban sustainability: an interdisciplinary, empirical study. Local Environ. 2009;14:155-172.
 Jeon JY, Lee PJ, You J, Kang J. Acoustical characteristics of water sounds for soundscape enhancement in urban open spaces. J Acoust Soc Am. 2012;131:2101-2109.
 Jeon JY, Lee PJ, You J, Kang J. Perceptual assessment of quality of urban soundscapes with combined noise sources and water sounds. J Acoust Soc Am. 2010;127:1357-1366.
 Brambilla G, Maffei L. Responses to noise in urban parks and in rural quiet areas. Acta Acust United Ac. 2006;92:881-886.
 Brambilla G, Gallo V, Zambon G. The soundscape quality in some urban parks in Milan, Italy. Int J Environ Res Public Health. 2013;10:2348-2369.
 Krause B, Gage S. Testing biophony as an indicator of habitat fitness and dynamics. SEKI natural soundscape vital signs pilot program report.CA:Wild Sanctuary, Inc.;2003.
 Pijanowski BC, Farina A, Gage SH, Dumyahn SL, Krause BL. What is soundscape ecology? An introduction and overview of an emerging new science. Landsc Ecol. 2011; 26:1213-1232.
 Pijanowski BC, Villanueva RLJ, Dumyahn SL, Farina A, Krause BL, Napoletano BM, et al. Soundscape ecology: the science of sound in the landscape. Bio Sci. 2011;61:203-216.
 Devos P. Soundecology indicators applied to urban soundscapes. Proceedings of Inter-Noise 2016; 2016, Aug 21-24; Hamburg, Germany. Ghent. Belgium: Ghent University;2016.
 R-project.org [Internet]. Vienna: The R Foundation;2018. [cited 2020 May 15]. Available from: https://www.R-project.org/.
 Sueur j, Aubin T, Simonis C, Lellouch L, Brown EC, Depraetere M, et al. Seewave: sound analysis and synthesis [Internet].Vienna: The R Foundation;2008[cited 2020 May 15]. Available from:https://cran.r-project.org/web/packages/seewave/index.html.
 Villanueva RL, Pijanowski BC. Soundecology: soundscape Ecology [Internet]. Vienna: The R Foundation;2008 [cited 2020 May 15]. Available from: https://cran.r-project.org/web/packages/soundecology/index.html.
 Qi J, Gage SH, Joo W, Napoletano BM, Biswas S. Soundscape characteristics of an environment a new ecological indicator of ecosystem health. 2007: 201-211.
 Grey JM, Grdon JW. Perceptual effects of spectral modifications on musical timbres. J Acous Soc Am. 1978;63:1493-1500.
 Coensel BD, Botteldooren D. The quiet rural soundscape and how to characterize it. Acta Acust United Ac. 2006;92:887-897.
 Raimbault M, Lavandier C, Bérengier M. Ambient sound assessment of urban environments: field studies in two French cities. Appl Acoust. 2003;64:1241-1256.
 Yang W, Kang J. Soundscape and sound preferences in urban squares. J Urban Des. 2005;10:61-80.
 Yu B, Kang J, Ma H. Development of indicators for the soundscape in urban shopping streets. Acta Acust United Ac. 2016;102:462-473.
 Pieretti N, Farina A, Morri D. A new methodology to infer the singing activity of an avian community: the acoustic complexity index (ACI). Ecol Indic. 2011;11:868-873.
 Farina A, Pieretti N, Piccioli L. The soundscape methodology for long-term bird monitoring: a Mediterranean Europe case-study. Ecol Inform. 2011;6: 354-363.
 Villanueva RLJ, Pijanowski BC, Doucette J, Pekin B. A primer of acoustic analysis for landscape ecologists. Landsc Ecol. 2011;26:1233-1246.
 Spellerberg IF, Fedor PJ. A tribute to Claude Shannon (1916-2001) and a plea for more rigorous use of species richness, species diversity and the ‘Shannon-Wiener’ Index. Glob Ecol Biogeogr. 2003;12:177-179.
 Shannon CE. A mathematical theory of communication. Bell Syst Tech J. 1948;27:379-656.
 Oksanen J, Blanchet FG, Kindt R, Legendre P, Minchin PR, Legendre P, et al. Vegan: community ecology package [Internet]. Vienna: The R Foundation;2008 [cited 2020 May 15]. Available from: http://CRAN.R-project.org/package=vegan.
 Gini CW. Variability and mutability, contribution to the study of statistical distributions and relations. studi cconomico-giuridici della r. universita de cagliari (1912). reviewed in : light, r. j., margolin, b. h. : an analysis of variance for categorical data. J Am Stat Assoc. 1971;66:534-544.
 Boelman NT, Asner GP, Hart PJ, Martin RE. Multi-trophic invasion resistance in Hawaii: bioacoustics, field surveys, and airborne remote sensing. Ecol Appl. 2007;17:2137-2144.
 Sueur J, Farina A, Gasc A, Pieretti N, Pavoine S. Acoustic indices for biodiversity assessment and landscape investigation. Acta Acust United Ac. 2014;100:772-781.
 Whittaker RH, Evolution and measurement of species diversity. Taxonomic J.1972;21:213-251.
 Pavoine S, Bonsall MB. Measuring biodiversity to explain community assembly: a unified approach. Biol Rev. 2011;86:792-812.
 Kasten EP, Gage SH, Fox J, Joo W. The remote environmental assessment laboratory’s acoustic library: an archive for studying soundscape ecology. Ecol Inform. 2012;12:50-67.
 Gage SH, Axel AC. Visualization of temporal change in soundscape power of a Michigan lake habitat over 4-year period. Ecol Inform. 2014,21:100-109.