| 1. |
- Alves, Sonia, et al.
(author)
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Towards the practical implementation of the holistic approach to urban sound planning
- 2016
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In: Proceedings of the INTER-NOISE 2016 - 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future. ; , s. 2924-2927
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Conference paper (peer-reviewed)abstract
- The holistic approach to urban sound planning concept, states that in order to achieve restorative sonic environments, acoustic characteristics should be considered from the beginning of the urban planning process. At this stage it is still possible to avoid the generation of noise, to design solutions that will inhibit noises but also enhance the existing soundscape and to coordinate different stakeholders' perspectives into a coherent solution. The challenges presented by this approach demand more than the traditional noise engineering tools. Therefore the traditional toolbox focused on urban noise reduction was extended to include soundscape analysis, auralisation (audio and visual), improved prediction/modelling methods, but also urban planning concepts and effective communication techniques. This paper will present an overview of the new approach, from the development of the holistic concept to its practical implementation at real test sites. © 2016, German Acoustical Society (DEGA). All rights reserved.
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| 2. |
- Alves, Sonia, et al.
(author)
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Urban sound planning - The SONORUS project
- 2016
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In: Proceedings of the INTER-NOISE 2016 - 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future. ; , s. 2319-2328
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Conference paper (peer-reviewed)abstract
- Sound is still insufficiently considered in most urban planning processes, resulting in unsatisfactory sonic environments that might even present health risks to citizens. No matter how complex and challenging the planning project might be, the creation or preservation of acoustically favorable environments should be part of urban planning. To support this process, the SONORUS project developed a holistic approach for urban sound planning and showed its benefits with practical test cases. The goal of the holistic approach is to facilitate the integration of sonic planning in an earlier stage of the planning process by combining different approaches and by providing new tools and methods, thus enabling urban planners to achieve healthy and supportive sound scenarios.
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| 3. |
- Estévez Mauriz, Laura, 1982, et al.
(author)
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SONORUS Urban sound planning project and test sites: an example within the planning stage
- 2016
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In: Proceedings of the INTER-NOISE 2016 - 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future.
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Conference paper (peer-reviewed)abstract
- SONORUS Urban sound planning project looks towards a proactive planning for improved sonic environments, coupled with the variables influencing the quality of life in cities. The project embraces a holistic urban planning approach, involving acoustics at the planning stage as another variable capable to enrich the built environment. To connect the research carried out with practical implementations, SONORUS incorporates four real case studies with different characteristics and a common demand on the improvement of the sound environment at different stages. This paper focuses mainly on Frihamnen test site (Gothenburg, Sweden), considered a strategic city project with the intention to transform the space into a dense mixed-use area. The paper goes through a general introduction framing the holistic approach in urban sound planning at four test sites. The discussion is centred in the research within Frihamnen and the workshop carried out with SONORUS members and city representatives, with the intention to analyse the acoustic situation and understand the impact of future developments on the sound environment. Finally, the work discusses about the consequences and possibilities that the holistic approach might have in urban sound planning and the entire urban planning process as a driving force to improve the liveability of spaces.
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| 4. |
- Scheuren, Joachim, 1946, et al.
(author)
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Extending the scope of urban sound planning by education and research
- 2014
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In: Internoise 2014, Melbourne, Australia. - 9780909882037 ; , s. 7-
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Conference paper (peer-reviewed)abstract
- Based on continuous research work as well as on growing demands of all involved it is widely agreed today that acoustic comfort in cities should aim for more than just preventing and controlling given noise. However, in practice this typically fails because of two dilemmas: Acoustical aspects are considered too late and with a limited scope only, limited to make other non-acoustic planning acoustically acceptable. This then prevents any approaches to plan and go for desired sound scenarios from being applied.The European Integrated Training Network SONORUS tries to overcome this restriction by application oriented research, exemplary application to test sites and – above all – by education. Nine partners from all over Europe, coordinated by Chalmers University of Gothenburg, work together to educate 14 young re- searchers in urban sound planning. Apart from complementing available tools for practical application and testing these tools in case studies provided by five associated European cities, the basic idea of the project is to supply the researchers with all skills enabling them to acoustically contribute with competence to a holistic urban planning process. It is hoped that the concrete availability of their respective competence will help to extend the scope of Urban Sound planning in practice.
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| 5. |
- Scheuren, Joachim, 1946, et al.
(author)
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SONORUS - Training Urban Sound Planners by Education and Research
- 2014
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In: Proceedings of Forum Acusticum. - 2221-3767. - 9788361402282 ; 2014-January, s. 7-
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Conference paper (peer-reviewed)abstract
- It is agreed by all involved in planning and designing urban areas that the visual appearance of cit- ies crucially determines the sense of living there and thus needs careful planning efforts. In con- trast to this, the acoustic appearance, i.e. the sound of urban areas has not been able to attract comparable planning efforts yet. Regardless whether this is seen as a consequence of insufficient predictability or of underrated relevance of sounds, it regularly ends up with involving acousti- cians and sound planners too late, thus making efficient sound planning and design unnecessarily difficult or even impossible.The dimension of this lack can be illustrated by imagining the contrary vision. We might have an implementable plan how an area would sound in the future, avoiding bad surprises and assuring efficient use of resources. We could protect restorative areas for the people’s well-being and we could avoid hot spots where otherwise we had to cope with unhealthy noise exposure afterwards. Today we are far from this vision and the normal situation is that we are happy if we can manage the most relevant problems.The Urban Sound Planner project SONORUS is an integrated training network (ITN) financed by the EC for a period of four years and coordinated by Chalmers University of Gothenburg in Swe- den. Nine partners from all over Europe participate in this training network to educate 14 young researchers in urban sound planning. At the end we hope to have young people who master the whole range of tools from proven noise control technologies to soundscape approaches. However, to make an impact, they also have to understand city planning and possess very good skills in team building and communication. During their education they will have the opportunity to train theses skills on test sites in Antwerp, Brighton, Gothenburg, Rome and Rotterdam.
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| 6. |
- Svensson, Jonas, 1982, et al.
(author)
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Active scattering control of flexural waves at beam junctions: The influence of beam properties on power flow and control effort
- 2008
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In: Journal of Sound and Vibration. ; 313:3-5, s. 418-432
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Journal article (peer-reviewed)abstract
- As a wave, propagating in a beam, enters a discontinuity it will be partly reflected and partly transmitted. The introduction of an external force can be used to impose restrictions on the scattering properties of the discontinuity. This phenomenon has been studied in the past, usually with the objective of changing the scattering properties of a free end. The purpose of this study is to investigate the effect of material parameters and cross-sectional dimensions on the control effort and power flow through a beam discontinuity, given a certain control objective. Active scattering factors, based on Euler–Bernoulli theory, are derived for the junction of two beams, with rectangular cross-sections. Desired constraints are put on one or several of these scattering factors and the equivalent required force is calculated. The control objectives studied are: a non-reflective junction, a non-transmissive junction and the minimisation of power flowing from the junction back into the beams. Derived expressions show that the control forces can, after normalisation, be expressed in a two-dimensional space (plane) for all possible material parameter and cross-sectional dimension combinations. In their limits these planes also contain the ideal termination cases. Thus, e.g. the required control forces in order to achieve a non-reflective junction for a clamped or free beam end are covered by these results. The transmission and reflection efficiencies for the different control objectives can also be depicted in the same plane. Results indicate the possibility of choosing a right-side beam and active force combination in such a way that the junction is anechoic and absorptive.
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| 7. |
- Svensson, Jonas, 1982, et al.
(author)
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Feedforward control of bending waves in frequency domain at structural junctions using an impedance formulation
- 2009
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In: Journal of Sound and Vibration. - 1095-8568 .- 0022-460X. ; 323:3-5, s. 555-573
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Journal article (peer-reviewed)abstract
- This paper presents an active impedance-matching technique for vibrating structures described by Euler–Bernoulli theory. Full 2×2 impedance matrices are included in the derivation of the reflection matrix of an arbitrary structural junction. This implies that the effects of both bending waves and bending near-fields are included. An active impedance load is introduced in order to match a discontinuity at the junction, i.e. to force the reflection matrix to zero. The impedance-matching technique is applied to two theoretical examples. First, maximum power transfer at a free end is investigated under the condition of incident bending wave and bending near-field; second, the approach is used to match the junction between an Euler–Bernoulli beam and a sandwich composite for an incident bending wave. The latter example proposes an active–passive damping configuration which employs active control to enclose all incident wave power in a dissipative sandwich-type structure. Results show that for this configuration, the active impedance load is responsible for the main part of the power absorption over a broad frequency range.
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