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 Expert  108346

Expert in Mechanical Noise/Vibration

Available for your Consulting and Expert Witness Needs

Ohio (OH)
Education Work History Career AccomplishmentsPublicationsConsulting Services Expert Witness

Summary of Expertise: Listed with other top experts in: 
Expert has expertise in many aspects of automotive noise control and issues related to sound quality. His research has been on technology's cutting edge in transmission noise, brake squeal, and electro-mechanical actuator noise. He has also consulted on engine noise, acoustic cavity modeling, noise perception, and other issues. Out of a nationwide competition, Expert was selected by General Motors to develop a new and innovative graduate course sequence in automotive NVH. He is currently developing practical case studies that will clearly illustrate automotive noise source and path mechanisms.

automobile noise


automobile noise control


mechanical noise


motor noise

Expert has significant experience in diagnosing, modeling, measuring, and controlling vibration problems in automotive systems and components. He is the foremost authority on hydraulic engine mounts, gear-clutch rattle analysis, and brake damping design. He has been a consultant to several companies and has devised new or improved vibration measurement or computational methods. Expert is also very familiar with structure-borne noise paths and power flow analysis techniques. Expert has led a team of US experts that participated in a workshop on this topic in India.

automobile vibration


automobile vibration analysis


machine vibration analysis

Expert has over 24 years of research and consulting experience in air conditioning and air or gas compressor noise. His computer codes on computer simulations and pulsation analysis are widely used for design purposes in both industry and academia. His insight and deep knowledge have been helpful in solving many noise and vibration problems, including valve impacts, shell resonances, manifold and muffler systems, liquid slugging, and others.

compressor noise


compressor noise control




noise control

As one of the nation's leading researchers in gear noise, Expert's work has been sponsored by automotive companies, national laboratories, and federal agencies. He has published over 20 articles and has given keynote lectures at international meetings. He has been effective in recognizing the roles of bearings in noise transmission, casing acoustics, and overall geared systems dynamics. In addition, Expert has solved the difficult problem of quantifying gear noise perception (rating or metric) based on objective vibro-acoustic measurements. Expert was a member of the US panel on vibration engineering that toured Korea in 1993. Also, Expert led the US panel on vibration and noise engineering that toured India in 1996.

gear noise

Expert is one of the premier experts on the modeling of machinery vibration and noise phenomena. His specialty is narrow band methods that incorporate structural or acoustic modes. Both deterministic and probabilistic approaches have been used in conjunction with finite and boundary element codes. Other techniques Expert has used to solve vibration problems include modal analysis, ray tracing, and transfer matrix. Expert heads the noise control methods committee of the Institute of Noise Control Engineering and serves on its Board of Directors.

material damping property


mechanical system vibration


vibration measurement


vibration modeling

Expert is one of the few active researchers in the areas of pneumatic actuators and shock absorbers. His specialty is in modeling nonlinear compliance, friction, and fluid flow characteristics in the context of the overall system dynamics. He has devised new rotary air valve concepts and demonstrated the proof of his concepts. He has also designed and implemented new control algorithms. Expert has published over 15 articles in this area.

pneumatic shock absorber



As a Visiting Professor at the University of California at Berkeley, Ray conducted research in the Dynamic Stability Lab (with C.D. Mote, Jr.) on the rotating disk acoustic problem. His work with acoustic noise issues has been applied to a variety of areas, from air conditioning systems to automobiles. He can answer questions on building acoustics and acoustical materials.

acoustic analysis


acoustic noise


acoustic noise abatement


vibration noise


machine noise

Show Secondary and Basic Areas of Expertise
Expert may consult nationally and internationally, and is also local to the following cities: Columbus, Ohio;  Cincinnati, Ohio;  Dayton, Ohio;  Springfield, Ohio;  Hamilton, Ohio;  and Middletown, Ohio.

Often requested
with this expert:

Sound, Vibration, and Dynamics
Acoustics: Building Noise Control, Mechanical System Noise...
Acoustical Engineering
Machinery Vibration, Condition Monitoring, Testing

Year   Degree   Subject   Institution  
1975   Ph.D.   Mechanical Engineering   Purdue University  
1973   M.S.   Mechanical Engineering   University of Roorkee (India)  
1971   B.S.   Mechanical Engineering   Birla Institute, Pilani  

Work History:
Years   Employer   Department   Title  

1988 to


(Undisclosed University)


Acoustics and Dynamics Lab




1987 to 1988


University of California at Berkeley


Department of Mechanical Engineering


Visiting Professor


1987 to


(Undisclosed University)


Mechanical Engineering Department




1983 to 1987


(Undisclosed University)


Mechanical Engineering Department


Associate Professor


1982 to 1995


(Undisclosed University)


Fluid Power Laboratory




1979 to 1983


(Undisclosed University)



Assistant Professor


Career Accomplishments:

Expert holds the Fellow grade in 3 Professional societies: American Society of Mechanical Engineers, the SAE Int. and Acoustical Society of America. He is also an active member of ASHRAE, and ASEE.


Board Certified Member of the Institute of Noise Control Engineering/USA.

Professional Appointments

Expert served as the President of the Institute of Noise Control Engineering from Feb. 2003 to Jan. 2004. He is on the Board of Directors for the INCE/USA and I-INCE. Expert has also served as an ABET evaluator. He has edited special issues of several journals, organized national and international conferences and serves on the editorial boards of Journal of Sound and Vibration, Applied Acoustics Journal and Sound & Vibration magazine. Expert led the US delegations to the 1996 and 2001 India-USA Symposium on Vibration & Noise Engineering.


Expert has been named as the first holder of The Donald D. Glower Chair in Engineering at Expert's University, effective July 1, 2001. This distinguished chair was established with a gift from the Transportation Research Center, Inc., in honor of Donald D. Glower, Dean, College of Engineering (1976-90) and Vice President, University Communications and Development (1990-92). The holder of this College of Engineering chair is expected to lead teaching and scholarly research efforts in transportation and ground vehicles.

Expert is now internationally recognized as the premier researcher and educator machine dynamics, vibration and acoustics, with expertise in vehicle noise & vibration control and gear dynamics & acoustics.

In addition to five Faculty Research Awards at OSU, Expert has received the "Outstanding Distance Learning Faculty Award from General Motors. Expert received the ASEE Westinghouse Award for "Distinguished Contributions to Teaching" in 1993. He won the 1990 OSU Harrison Faculty Award for Excellence in Engineering Education and the 1989 Institute of Noise Control Engineering Award for Excellence in Teaching.

Publications and Patents Summary

He has published over 300 articles including 145 journal articles and has attracted significant research support from automotive industry and government.

Selected Publications and Publishers  
 - Allied Publishers  
 - ASME Journal of Mechanical Design  
 - Part IV: Statistical energy analysis.J. Sound Vib.  
 - Journal of Sound and Vibration  
 - Plenary Lecture, 3rd International Machinery Monitoring & Diagnostics Conference  

Consulting Services:
Recent Client Requests:
  • Expert for consulting on DC Motors.
  • Magnetic electromagnetic expert for consulting on electromagnetic field causing acoustic vibrations.
  • Expert in Pump/motor Noise.
  • Accoustic expert for consulting on Reducing decibels on fixed generator.
Click the green button above to contact Expert for a free initial screening call regarding your expert consulting needs.  Expert is available for consulting to corporate, legal and government clients.  Remember, your initial screening call to speak with Expert is free.

Expert Witness:
Recent Litigation Client Requests:
  • Expert in internal combustion engines for consulting on crankshaft rotary torsional vibration.
  • Random vibration expert for consulting on random vibration profiles.
  • Noise expert for consulting on sound.
Click the green button above to contact Expert for a free initial screening call regarding expert testimony, litigation consulting and support, forensic services, or any related expert witness services.  A few litigation needs include product liability, personal injury, economic loss, intellectual property (patent, trademark, trade secret, copyright), and insurance matters.  Remember, your initial screening call to speak with Expert is free.

International Experience:
Country / Region   Summary
Europe, Asia, India   Expert sponsored a research program with Nissan of Japan and has collaborated in research with institutions in France and India. He has lectured in the UK, France, Korea, Japan, and India.

Language Skills:
Foreign Language   Description
Hindi   Expert can speak, read and write Hindi.

Additional Skills and Services:

He has developed and taught an innovative, year-long graduate course sequence on noise, vibration and harshness control, in partnership with General Motors.

Supplier and Vendor Location and Selection

Expert has experience locating vendors of the following: noise and vibration control products, dynamic and acoustic software/codes, dynamic signal analysis equipment, and instrumentation and sensors.


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