Rodolfo Venegas

CREDENTIALS

  1. R. Venegas, “Microstructure Influence on acoustical properties of multi-scale porous materials,” PhD Thesis, University of Salford, UK, 2011.
  2. R. Venegas and O. Umnova, “Acoustical properties of double porosity granular materials,” J. Acoust. Soc. Am. 130 (5), pp. 2765-2776 (2011).
  3. R. Venegas and O. Umnova, “Acoustical properties of packings of porous grains,” 3rd Symposium on the Acoustics of Poro-Elastic Materials SAPEM 2011, Dec. 14-16, Ferrara, Italy, 2011(Invited paper).
  4. S. Floody and R. Venegas, “Differential evolution applied to room acoustic optimisation,” IX Congreso de la Sociedad Chilena de Investigación Operativa OPTIMA 2011, Oct. 26-29, Pucon, Chile, 2011.
  5. S. Floody, R. Venegas and F. Leighton, “Optimal design of slit resonators for acoustic normal mode control in rectangular rooms,” COMSOL Conference, Nov. 17-19, Paris, France, 2010.
  6. S. Floody and R. Venegas, “Shape optimization of polygonal rooms based on spatially homogeneous sound field distribution and psychoacoustic criteria at low frequencies,” Euronoise 2009, October 26-28, 2009, Edinburgh, UK.
  7. S. Floody and R. Venegas, “Room shape optimization for the correct normal modes distribution at low frequencies based on psychoacoustic criteria,” Revista de Sonido y Acústica, 3 (3) pp.28-34 (2008).
  8. S. Floody and R. Venegas, “Shape optimization of polygonal rooms for a correct modal distribution at low frequencies based on psychoacoustic criterion, Acoustics’08, June 29 - July 04, 2008, Paris, France.
  9. S. Floody and R. Venegas, “Shape optimization in rectangular rooms for a correct modal distribution at low frecuencies based on psychoacoustical model,” XVI Congress on Numerical Method and their Applications ENIEF 2007 and I Congress on Computational, Industrial and Applied mathematics MACI 2007, Cordoba, Argentine, October 02-05, 2007.
  10. R. Venegas and J. Undurraga, “In situ evaluation of sound insulation using transfer function measurements,” 19th International Congress on Acoustics ICA Madrid 2007, 2-7 September, 2007, Madrid, Spain. (Invited paper)
  11. J. Undurraga and R. Venegas, “Continuous reverberation time estimation applied to obtain normalized sound level differences,” 19th International Congress on Acoustics ICA Madrid 2007, 2-7 September, 2007, Madrid, Spain.
  12. R. Venegas, M. Nabuco, P. Massarani, “Sound insulation evaluation using transfer function measurements,” Building Acoustics, 13 (1),pp. 23-31(2006).
  13. P. Massarani, M. Nabuco and R. Venegas, “Level adjustment for multi-channel impulse response measurements in building acoustics,” 34th Internoise, International Congress and Exposition on Noise Control Engineering, 7-10 August 2005, Rio de Janeiro, Brazil.
  14. R. Venegas, M. Nabuco, P.Massarani, Sound Insulation evaluation using Transfer Function Measurements,” 34th Internoise, International Congress and Exposition on Noise Control Engineering, 7-10 August 2005, Rio de Janeiro, Brazil.
  15. A. Boardman, O. Umnova, A. Elliot, and R. Venegas, "Membrane acoustic metamaterials for ear defenders with low frequency capability," Research report for DSTL, 2013 (in preparation).
  16. O. Umnova, A. Elliot, J. Coakley, and R. Venegas, "A graded-index omnidirectional acoustic absorber," Research report for DSTL (Contract No DSTLX1000063985), 2012.
  17. R. Venegas and O. Umnova, "Numerical modelling of sound absorptive properties of double porosity granular materials," COMSOL Conference, Nov. 17-19, Paris, France, 2010.
  18. R. Venegas and O. Umnova, "Acoustics of porous media: A tortuous history," XIII Encuentro Internacional de Acustica SEMACUS 2010,Oct 1-2, Santiago, Chile, 2010 (Plenary Lecture).
  19. R. Venegas and O. Umnova, "Sound propagation in multi-scale porous materials," XIII Encuentro Internacional de Acustica SEMACUS 2010,Oct 1-2, Santiago, Chile, 2010 (Plenary Lecture).
  20. O.Umnova, R. Venegas and A. Krynkin, "Effective medium models for acoustic materials," Tyndall medal lecture, IoA conference: Noise in the built environment, April 29-30, 2010, Ghent, Belgium.
  21. R.Venegas and O. Umnova, "Effective acoustical properties of random microfibrous materials," Euronoise 2009, October 26-28, 2009, Edinburgh, UK.
  22. O. Umnova, R.Venegas and F. Bechwati, "Acoustical properties of microporous granular materials," Euronoise 2009, October 26-28, 2009, Edinburgh, UK.
  23. R.Venegas and O. Umnova, "Acoustical properties of random arrays of micro cylinders," 1st International Conference on challenges of porous media, March 11-14, 2009, Kaiserslautern, Germany.
  24. O. Umnova, D. Tsiklauri and R. Venegas, "Effect of boundary slip on the acoustical properties of microfibrous materials," Journal of the Acoustical Society of America, 126(4), pp.1850-1861 (2009)
  25. R.Venegas and O. Umnova, "Acoustical properties of disordered arrays of circular cylinders," SAPEM 2008, December, 17-18-19, Braford, UK.
  26. R. Venegas and O. Umnova, "On the influence of the micro-geometry on sound propagation through periodic array of cylinders," Acoustics’08, June 29 - July 04, 2008, Paris, France.
  27. O. Umnova, D. Tsiklauri and R. Venegas, "Influence of boundary slip on the acoustical properties of microfibrous absorbents," Acoustics’08, June 29 - July 04, 2008, Paris, France.

John Coakley

CREDENTIALS

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THE INNOVATION FORUM
51 FREDRICK ROAD
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M6 6FP UK

+44 (0) 161 743 3528
JOHN.COAKLEY@CARBONAIR.EU

Carbon Air Consultancy

As a certified Comsol Multiphysics consultant, we can model and measure almost any physical acoustic phenomenon but we specialise in acoustic materials

Working with the acoustic laboratories at the University of Salford we can test, characterise and model just about any acoustic material and provide optimisation and design services for noise control, room acoustics, building acoustics, and audio applications.

Our goal is to make your technologies thinner, lighter and smaller without compromising performance

 

WHAT WE CAN DO FOR YOU

Porous
Materials

With access to the University of Salford’s Acoustic Research Laboratories, Carbon Air can characterise, measure and model the physical and acoustic properties of porous materials, including complex granular structures such as Activated Carbon and Perlite, using optical granulometry, flow resistivity rigs, impedance tubes and reverberation chambers.

We can create mathematical models for predicting the acoustic properties of such materials, ready-to-run Comsol models and optimised material specifications for your particular application.

Architectural
Acoustics

Carbon Air can model and design rooms, recording studios, home cinemas and architectural spaces such as restaurants, pubs, open plan offices and gyms.

We can also provide optimised material specifications, room dimensions and absorber installations, delivering ready-to-run models in Comsol for architectural acoustic applications if needed.

Building
Acoustics

We can measure sound transmission loss using an impedance tube or transmission suite  and model complex acoustic-structural interactions such as membrane metamaterials.

We can also provide optimised acoustic characteristics of materials for building acoustics applications.

Noise
Control

Carbon Air can model and measure transmission loss and calculate pressure drop in silencers and design silencers for particular applications.

We have also developed novel configurations involving granular absorber linings that enable a significant reduction in the size of a silencer’s expansion chamber.

Outdoor sound
propogation

Carbon Air can model insertion loss due to noise barriers (reflective and absorptive) including the influence of the barrier’s geometry and ground reflections.

But we also have experience of more unusual configurations in this field. We have  modelled and tested a graded-index acoustic metamaterials device that can achieve near perfect absorption across a range of frequencies, regardless of incident angle.

For more information about this please contact us using the form below.

Audio

We can model the frequency response of loudspeakers, headphones and microphones (including MEMS microphones) and have developed unique expertise and modelling capability around the unusual behaviour of activated carbon in altering the acoustic compliance of loudspeaker cavities.

Carbon Air can help you reduce the size of a loudspeaker or sub-woofer cabinet without losing low-end response.

Transport Phenomena
in Porous Media

We can model oscillatory and static fluid flow and heat transfer in fibrous and granular porous materials.

These models can include rarefaction effects, electric conduction and diffusion phenomena.

Get In touch today

MANY OF OUR TECHNOLOGIES CAN’T BE MADE PUBLIC

Get in touch so we can tell you more

We have developed  models for working with partners to suit each opportunity and budget, ranging from straight consultancy through revenue sharing agreements, licensing, sector-specific exclusive collaborative agreements to full venture partnering.

We will find the right model to work with you.

WE LOOK FORWARD TO HEARING FROM YOU

Meet the Carbon Air Team

WHETHER YOU NEED A ONE-OFF PROJECT, AN ACADEMIC COLLABORATION  OR A LONG-TERM  TECHNOLOGY DEVELOPMENT PARTNERSHIP, WE WILL FIND THE RIGHT MODEL TO WORK WITH YOU

John Coakley

John Coakley

Managing Director

Rodolfo Venegas

Rodolfo Venegas

Technical Director

Carbon Air Limited is a spin-off company from the University of Salford, with backing from the North West Fund for Venture Capital. We still work closely with The University’s Acoustic Research Group and the group of inventors who made the company possible;

Dr Olga Umnova, Dr Rodolfo Venegas, Professor Andy Moorhouse, Dr Andy Elliott, Professor Trevor Cox and Dr Mark Avis

And with special thanks to Dr Fouad Bechwati whose PhD set the ball rolling in the first place

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