Living Walls Knowledge Transfer Day - 15 April 2014 (04/13 Kirill Horoshenkov)

Please see more details and information on: http://lanyrd.com/2014/livingwalls/

Professor Horoshenkov , Department of Mechanical Engineering, University of Sheffield

Professor Horoshenkov holds a MEng in Electro-Acoustics and Ultrasonic Engineering from Moscow University for Radio engineering, Electronics and Automatics (Russia) and PhD in Computational and Experimental Acoustics from the University of Bradford (UK). Before accepting the position of a Personal Chair at the University of Sheffield in May 2013 worked at the University of Bradford where he progressed from a research assistant to a full professor.
Research Areas
Professor Horoshenkov’s main research interests are in novel sensors for water industry, novel acoustic materials and material characterisation methods. His other area of work relates to noise control, audio-visual interactions and design of nature-inspired noise control solutions.
He has authored and co-authored 2 books, over 140 journal and conference papers, and 9 patents. In recognition of his contribution to the field of acoustics he was awarded the prestigious Tyndall Medal by the Institute of Acoustics in 2006. He is a founder of Acoutechs Limited, a spin-off University company, which was established in 2000 to exploit the results of his research related to Patent WO/2003/069595 on novel acoustic material manufacturing technology.
This technology is now licensed to Armacell and exploited globally with an average marked value of £10M per annum. More recently, he received a Brian Mercer Award from the Royal Society of London www.youtube.com to exploit commercially the results of his other research on novel acoustic instrumentation for rapid inspection of underground pipes (Patent WO/2010/020817). This technology resulted in the new University spin-off company, Acoustic Sensing Technology Limited (http://www.acousticsensing.co.uk/), of which he is a founder. This enterprise is sponsored by The North West Fund for Energy & Environmental.

Transcript

1. Acoustic Properties of Living Plants Kirill V. Horoshenkov Department of Mechanical Engineering, University of Sheffield, UK k.horoshenkov@sheffield.ac.uk http://www.greener-cities.eu/
2. 28/04/2014 © The University of Sheffield CONTENTS • Rationale for this work • Measuring acoustical properties of plants • Modelling acoustical properties of plants • Data • Related non-acoustic benefits • Conclusions
3. 28/04/2014 © The University of Sheffield URBAN ROAD BARRIERS RURAL ROAD BARRIERS ENVIRONEMNTAL NOISE CONTROL: TRADITIONAL MEANS
4. Hong Kong, China (by ESKYIU) APPLICATIONS OF GREEN WALLS: OBJECTIVE AND SUBJECTIVE NOISE CONTROL Marceille, France (by Canevaflor)
5. MEASUREMENTS: IN REVERBERATION CHAMBER
6. MEASUREMENTS: IN LAB ON SMALL SPECIMENS
7. 28/04/2014 © The University of Sheffield MEASUREMENTS: IN-SITU
8. MODELLING: KEY MORPHOLOGICAL PROPERTIES FOR PLANT ACOUSTICS Effective flow resistivity Tortuosity L θ Leaf area density Dominant angle of leaf orientation L θ , v L A θ ( ) L σ θ ( ) L α θ ∞ Equivalent fluid model [JASA, 2013]
9. 28/04/2014 © The University of Sheffield MODELLING: EQUIVALENT FLUID MODEL: 3-LAYER SYSTEM (1) bottom soil layer air top soil layer plant layer [http://www.bigskyco2.org/whatisit/terrestrial]
10. 28/04/2014 © The University of Sheffield 1 1 1 ( , ), ( , ), ( , ) z k ω θ ω θ θ ω θ 0 0 , , c ρ θ 2 2 2 ( , ), ( , ), ( , ) z k ω θ ω θ θ ω θ 1 4 2 3 bottom soil layer air top soil layer plant layer 3 3 3 ( , ), ( , ), ( , ) z k ω θ ω θ θ ω θ MODELLING: EQUIVALENT FLUID MODEL: 3-LAYER SYSTEM (2) [Internoise, 2013]
11. 28/04/2014 © The University of Sheffield /2 0 ( ) 2 ( , )cos sin d π α ω α ω θ θ θ θ = ∫ MODELLING: RANDOM INCIDENCE ABSORPTION
12. 28/04/2014 © The University of Sheffield DATA: NORMAL INCIDENCE ABSORPTION COEFFICIENT FOR PLANTS ONLY [JASA, 2013]
13. DATA: RANDOM INCIDENCE ABSORPTION COEFFICIENT FOR PLANS IN HIGH-DENSITY SOIL [Internoise, 2013]
14. 28/04/2014 © The University of Sheffield soil only DATA: RANDOM INCIDENCE ABSORPTION COEFFICIENT FOR PLANS IN LOW-DENSITY SOIL [Internoise, 2013]
15. ENVI. QUALITY = A x NF – B x NL RELATED NON-ACOUSTICAL BENEFITS: SUBJECTIVE INPROVEMENT IN ENVIRONMENTAL QUALITY noise level % of natural features (green elements) i.e. 70% increase in the % of green elements ~ 20 dB decrease in perceived noise level
16. 28/04/2014 © The University of Sheffield CONCLUSIONS • It has been shown that plants can absorb a considerable proportion (40-60%) of the incident sound energy. • It has been shown that the acoustical properties of soil and plants can be measured and modelled. • The absorption of soil with and without plants can be predicted using a 2-, 3-layer model in which the values of the non- acoustical properties may need to be adjusted to account for variability in moisture and compaction. • It has been shown that soil with a carefully selected types of plants can absorb up to 100% of the incident sound energy. • It has been shown that adding plant specimens with a relatively large leaf area density can significantly (up to 35%) increase the absorption coefficient of soil.