dB-TECH presents a series of topics related to simulation.

From methods to accurately partition a large volume into several smaller ones in Statistical Energy Analysis (SEA) to computation of total TL from a group of panels with known TL, dB-TECH introduces topics in a simple, straightforward way.

The topics are a single page in length and right to the point.  Each topic introduces the context, presents the method of resolving the problems and when appropriate also includes an example.

Topics to come will cover any methods of simulation whether FEM, BEM, SEA and their coupling.

Your suggestions of topics are welcome…

dBVibroAcoustics, a consulting company with focus on vibro-acoustics simulation and noise control, has started a collaboration with Prosynx Technology, the leading virtual test software development and engineering services company in China.

Both companies plan to collaborate to help Chinese company increase their noise and vibration expertise, improve their efficiency in virtual model building and accurately model sound package components to design quieter, safer and more comfortable products.

Major industries such as Automotive, Aerospace, Railway, Marine, Energy and Industrial will benefit from this collaboration with the increased frequency at which Denis Blanchet will visit China.

Do not hesitate to contact dBVibroAcoustics  (Denis.Blanchet@dBVibroAcoustics.com)) or Prosynx (NVH@Prosynx.com) for more information on this collaboration or to enquire about a possible consulting project.

See also:



Denis Blanchet will present the keynote speech at the OffShore Vessel Conference 2016 (OSV) in Singapore on September 8 and 9 2016.


Using Noise & Vibration Simulation Early In Design Process To Avoid Panic At Sea Trials


Offshore Support Vessels (OSVs) often exhibit high noise levels in accommodations due to their close proximity to the main engines and bow thrusters, which are all concentrated in the front of the vessel.  This paper builds on the experience gained over the years in automotive, aerospace and railway, where simulation has proven to be a key to meeting stringent targets by impacting the product early in the design process.  Simulation is also driving major cost saving since it eliminates the potentially costly fines related to noise levels not meeting contract target levels. It also eliminates the cost of designing and implementing counter-measures in a rush just after sea trials, under daily fines and having to dismantle parts of the vessels to insert more insulation.  Not a situation you want to find yourself.  It also reduces cost by allowing designers to optimize the sound package content and placing just the right amount of insulation and damping treatment at the right location and nothing else.  This results in an optimal design instead of resorting to a costly unnecessary over-design strategy. Design early for quiet delivery!

The speech titled “Using noise & vibration simulation early in design process to avoid panic at sea trials” will discuss the concepts of noise and vibration control on-board ships. An OSV SEA model will be used to illustrate the concepts, offer understanding of how vibration energy migrates though the structure and how to best model such a vessels to rigourously represent the physics of the problem.

Contact Denis at Denis.Blanchet@dBVibroAcoustics.com for more information.

Last week, my latest technical paper was published at the ISNVH (International Styrian Noise, Vibration & Harshness Congress) congress in Graz, Austria.

This paper presents new advances in predicting wind noise contribution to interior SPL in the framework of the Wind Noise German Working Group composed of Audi, Daimler, Porsche and VW.  In particular, a new approach was developed that allows to fully describe the wind noise source using CFD generated surface pressure distribution and its cross-correlation function and apply this source on an SEA side glass.  This new method removes the need to use a diffuse acoustic field or several plane waves with various incidence angle to approximate the correct acoustics source character to apply on the SEA side glass.  This new approach results are compared with results previously published which use more deterministic methods to represent the side glass and the interior of a vehicle. This paper was a collaboration between Luca Alimonti, Anton Golota and myself.

Download this paper for free at www.dbvibroacoustics.com/resources/techpapers.     Simply register and download.  And take that opportunity to view and download 50+ more technical papers from a wide range of industries and vibro-acoustic methods.

dBVibroAcoustics, a consulting company with focus on Vibro-Acoustics simulation and noise control in automotive, aerospace, railway and marine industries launches its official website.

Our website is aimed at introducing to the market our background, experience and expertise in a dynamic and modern way.  It also describes our offering and how we can adapt to any customer needs.  It also includes a resources section where various documents are available for download. Finally, check out the testimonials from all around the world by top experts in the field of vibro-acoustics.

“We wanted to design a website that represents the culture of dBVibroAcoustics” says Denis Blanchet, Owner and Principle Consultant at dBVibroAcoustics.  “Our core values are to be creative, innovative, deeply knowledgeable, dynamic, a solution finder with out-of-the-box-thinking, optimistic with a long-term vision, friendly, positive, empathic with attention to details. We hope our website will convey these values and give you an idea of what great things we can do for you”

Hope you enjoy our website and find it useful.  We plan to add to the resources section over time and will let you know when new material becomes available.

Visit www.dBVibroAcoustics.com now to discover a world of possibilities.