| 1. |
- Hellström, Björn, 1959-, et al.
(författare)
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Acoustic Design Artifacts and Methods for Urban Soundscapes
- 2008
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Ingår i: The 15th International Congress on Sound and Vibration In: International Journal of Acoustics & Vibration. ; , s. 52-52
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Konferensbidrag (refereegranskat)abstract
- The research question is: “How to develop and apply acoustic artifacts and design methodologies for improving soundscapes in urban outdoor spaces?” In the project, this research question is limited to two specific types of urban outdoor spaces – city-park and city-square – and to two types of acoustic design artifacts. These are: I. Dynamic promotion of qualitative site specific sounds (e.g., the overall site specific sonic atmosphere, sounds from human activities, birds and fountains), which creates an improved soundscape. II. Sound-art installations, that creates delimited auditory sub-spaces within the park/square. The purpose and method is: 1. To provide two case-studies of artistic soundscape improvement, one in a noise polluted city-park and one in a city-square. The case-studies will serve as models for future applications of the new acoustic design artifacts. 2. To create and validate an innovative acoustic design methodology based on state-of-the-art real-time acoustic simulation tools integrated into the design process. The methodology will be validated in psychoacoustic listening experiments and field studies. 3. To determine the potential of the two acoustic design artifacts (I Dynamic promotion of qualitative site specific sounds, and II Sound-art installations) for providing pleasant and restorative soundscapes, in order to strengthening the social interaction as well as the spatial and aesthetical qualities in noise polluted city parks/squares. The present project beats a new track by combining acoustic design with sound art research, integrating methodologies based on real-time acoustic simulation and application of psychoacoustic methodology for validating simulations and for evaluating perceptual, emotional and behavioural effects on visitors to public open spaces. The ongoing research project, financed by the Swedish Research Council, is executed by the University College of Arts, Crafts and Design (Konstfack), Gösta Ekman Laboratory – Stockholm University and Karolinska Institutet and the Interactive Institute, all in Stockholm, Sweden.
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| 2. |
- Hellström, Björn, 1959-
(författare)
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Acoustic Design Artifacts and Methods for Urban Soundscapes : A Case Study on the Qualitative Dimensions of Sounds
- 2012
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Ingår i: Proceedings of Inter-noise 2012 "Quieting the world's cities".. - New York, USA : Institute of Noise Control Engineering. ; , s. 1-12
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Konferensbidrag (refereegranskat)abstract
- Noise is steadily on the rise in urban settings, creating a potential health hazard as well as being a nuisance. In major European cities, noise levels are so high that the majority of urban parks can no longer truly serve as recreational environments, a problem the WHO and the EU are attempting to address. This study explores various strategies that promotethe sustainable development of urban soundscapes at locations meant for rest, recreation, and social interaction. How are people affected by the combined effects of traffic and nature sounds in urban parks? To this end, we adopted a new track – the use of interdisciplinarymethodology – bringing together architectural analysis and artistic experiments, along with psychoacoustic methodology to evaluate aesthetic, emotional, perceptual, and spatial effects. A large-scale case study was conducted at a city park to explore if and how subjects are affected by purposely distributed sounds. The working hypothesis was that it is possible to cancel out traffic noise by affecting aural perceptions using a process known as informational masking. Our long-term objective is to create a scientific foundation for action plans, both pre-emptive and trouble-shooting, targeting parks and other similar public spaces that provide a relaxing environment.
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| 3. |
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| 4. |
- Hellström, Björn, 1959-
(författare)
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Acoustic design Artifacts and Methods for Urban Soundscapes
- 2009
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Ingår i: Proceedings of a meeting held 5-9 July 2009, Krakow, Poland.. - : International Institute of Acoustics and Vibration (IIAV). - 9781615677368 ; , s. 1-8
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Konferensbidrag (refereegranskat)abstract
- The research question is: "How to develop and apply acoustic artefacts and design method-ologies for improving soundscapes in urban outdoor spaces?" In the project, this research question is limited to one specific type of urban outdoor space – city-park – and to two types of acoustic design artefacts. These are: I. Dynamic promotion of qualitative site specific sounds (e.g., the overall site specific sonic atmosphere, sounds from activities, birds and fountains), which creates an improved soundscape. II. Sound-art installations, that creates de-limited auditory sub-spaces within the park/square.
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| 5. |
- Hellström, Björn, 1959-
(författare)
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Acoustic design in Commercial Space
- 2006
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Ingår i: ICSV13 Proceedings.
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Konferensbidrag (refereegranskat)abstract
- The starting point for this paper is to discuss and challenge the visual dominance in architectural thinking, and to raise competence among architects and planners on sound and sound environment issues. To promote a sustainable urban environment,sounds must be integrated in the complexity of urban design and development. Therefore,it is especially important to integrate acoustic and architectural analysis.The paper focuses on urban public space as well as indoor public pathways, communication space and semi-public commercial space, e.g. shopping malls, wherereliability on sonic orientation may be crucial. For these kinds of collective spaces, I argue, it is especially important to integrate acoustic and architectural analysis. Their sonic conditions are often loud, blurred, and confusing, with little correspondence between visual and aural perception, and with weak articulations of spatial dimension, distance, borders, and orientation. If not cared for, the result may be increasing sound disturbance, lack of people’s moving through the areas, dangerous differences between day and night use, disorientation for several user groups, and segregation.The paper is integrated in the ongoing research project, Transmission, executed by Urban Sound Institute (USIT), financed by Swedish Research Council. Results will hopefully deliver good examples and operative methods to be used by architects, planners and acousticians. The paper is also a result of ongoing projects and research at the acoustic consultancy company Ingemansson Technology AB, Sweden
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| 6. |
- Hellström, Björn, 1959, et al.
(författare)
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Modelling the shopping soundscape
- 2011
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Ingår i: Journal of Sonic Studies. - Leiden : Leiden University Press. - 2212-6252. ; 1
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Tidskriftsartikel (refereegranskat)abstract
- This article’s pivotal theme is: “How to compose a site-specific sound-art installation for a commercial space in order to improve conditions, while taking perceptual, social, aesthetical, temporal and spatial criteria into account” The interdisciplinary, art-based research approach is derived from the concept of acousmatics, i.e. the process of apprehending any sound, the source of which is invisible. Acousmatic perception concerns the everyday identification process; when lacking visual contact with the sound source, we automatically seek references, such as social (what produces the sound and what is my relation to it?), aesthetical, spatial and temporal (e.g. orientation and demarcation). The acousmatic concept identifies phenomena based on individually, culturally and spatially conditioned experiences. Today, a shopping culture dominates urban space. Indoor malls expose us to all types of acousmatically perceived sounds: jingles, signals, music and muzak from public loudspeakers, mobile devices, etc. In this respect, one could claim that the soundscape of the shopping culture embodies an acousmatic environment. In 2009, the research and sound-art group Urban Sound Institute (USIT) created a permanent sound installation in a shopping mall (Gallerian) located in downtown Stockholm. This installation serves as a case study for the present paper. The artistic assignment involved the creation of a meeting place without material devices as well as the enhancement of the overall atmosphere. The research objective was to elucidate different qualities of the sound installation in regard to the acousmatics of the shopping mall, promoting discussions on the articulation of sound-space configurations in relation to time and site-specific context, issues on musical-architectural qualities as well as objective, subjective and inter-subjective interrelationships between the experience of the sound-art installation and the experience of the shopping mall soundscape. Other applied, interrelated concepts are metabolic environment and masking- and cutting effects.
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| 7. |
- Hellström, Björn, 1959-, et al.
(författare)
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Redesign of One Atmosphere : What do you want to hear?
- 2008
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Ingår i: Faire une ambiance / Creating an atomsphere.
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Konferensbidrag (refereegranskat)abstract
- In an ongoing research project the design of acoustical atmospheres in large indoor spaces are investigated. The research question is: “How to redesign one sonic atmosphere into a variation of sub-atmospheres in large indoor spaces?” This question is especially valid for spaces such as semi-public commercial spaces (e.g. shopping malls), libraries, airports and communication spaces. The sonic atmosphere in these collective spaces is often loud, blurred and confusing, with little correspondence between visual and aural perception, and with weak articulations of spatial dimension, distance, borders and orientation. Together the different sound sources within these spaces generate a sonic hubbub. Even though such spaces comprise of several types of activities, the sonic atmosphere is the same all over the place.Hence, this research project focuses on design of sonic variations of the atmosphere; i.e., site specific sounds that deal with qualities such as communication, comfort, orientation, identity and privacy. The objective is to develop and test an interdisciplinary design methodology, which comprises a number of co-related methods; e.g. acoustic measurements, architectural site analysis, as well as virtual modeling and representation (visual and acoustic) of the space. The main part of the project is the virtual modeling and representation. It connects software that handles architectural 3D-modelling (SketchUp) with the Catt-Acoustic software, used for prediction and auralization.The research project also includes a case-study, which comprises proposals for redesign of a congress centre (Scandic Infra City), situated north of Stockholm. The proposals –consisting of architectural elements, sound installations (additions of sounds) as well as acoustical measures – will be demonstrated in a virtual model. The presumed effect is a differentiation in terms of a variety of sonic sub-atmospheres within the congress centre. The methodology developed in the project is intended to function as a tool for design measures of large indoor spaces. It is an interdisciplinary tool in that it supports acousticians as well as architects. The case-study may serve as a pilot model for future applications of redesign of the sonic atmosphere in large indoor spaces.This paper is a result of a research project, executed by the acoustic consultancy company ÅF-Ingemansson and the University College of Arts, Crafts & Design (Konstfack), Stockholm. The project has funding from the White’s Foundation for research and ARKUS, a Swedish foundation for the improvement of qualifications within architecture.
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| 8. |
- Hellström, Björn, 1959-, et al.
(författare)
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Room acoustic design in open-plan offices
- 2009
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Ingår i: Proceedings of the Institute of Acoustics Volume 31 Pt.3. - St. Albans, United Kingdom : Institute of Acoustics. - 9781615676804 ; , s. 2954-2959
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Konferensbidrag (refereegranskat)abstract
- In a Nordic cooperation project the acoustical conditions in open-plan offices was investigated. Measurements have been carried out in five open plan offices accompanied with an inquiry gathering the subjective judgments by the staff. A program for the acoustical measurements was designed specifying how to perform the measurements and which type of parameters to measure. The acoustical parameters included in the measurements are Reverberation time T20, Early Decay Time (EDT), Clarity (C50), Speech transmission index (STI), Speech intelligibility index (SII), Privacy Index (PI), Rate of spatial decay of sound pressure levels per distance doubling (DL2 ), Excess of sound pressure level with respect to a reference curve (DLf), background noise levels in occupied and unoccupied offices. In two of the offices are furbishment program was carried out. Measurements as well as questionnaire were accomplished after refurbishment. The effect on room acoustic parameters DL2 and DLf and on subjective judgments by the staff will be presented in this paper.
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