Chat with the Experts
SAE is excited to once again offer "Chat with the Experts" discussion groups - designed to create an informal environment between audience and expert to explore technical issues, pose questions of concern, and share lessons learned. The goal of these chat sessions is to enhance technical understanding and facilitate interactivity problem solving.
Tuesday, June 23, 2015
Featuring Technical Experts: Thomas Lagö, Jim Thompson, Pranab Saha and Kalyan Bagga
Signal Processing - Thomas Lagö
Today, signal processing and methods are very common when analyzing sound and vibration data. We use digital data and hence, the conversion from analog to digital (and sometimes even back to analog) becomes important tasks. The same goes with filtering, FFT analysis, time domain methods, measurement systems etc. Feel free to ask Dr. Lagö any topic in this field. Dr Lagö has more than 35 years practical experience and has solved many challenges around the world. With his vast knowledge and experience from multiple scientific areas, he will be able to "talk your language" and expand the views on proper and efficient methods and handle almost any questions in this field.
Dr. Thomas Lagö is globally accomplished in the sound and vibration area. He has four Post Doctoral degrees in conflicting scientific disciplines and consults with organizations such as NASA, Rolls Royce, ABB, Volvo, SAAB, Scania, Boeing, Atlas Copco, TATA, Indian Navy, and many other world leading organizations. Dr. Lagö has implemented paradigm shifting technologies around the world and presents advanced classes to these companies to assist them in solving problems in advanced acoustic and vibration applications. He has more than 40 years of industrial experience. He has a vast practical experience and teaches sound and vibration courses and applicable mitigation methods on an international basis and has given courses for many international universities and expert groups. He has served the SAE NVC committee for more than 14 years and has become a BINDT Fellow, (British Institute for Non-Destructive Testing) and he is the Industrial Chair for ISCM - The International Society for Condition Monitoring. Lagö is also involved in a number of other scientific organizations. He is also an AES member and participates in multiple standardization groups for sound in concert halls, movie theatres and speaker systems. He is author of more than 300 scientific papers, written multiple chapters in international textbooks and holds more than 25 patent/ patent applications and has received multiple awards. More info can be found at thomaslago.com
Brake Noise - Jim Thompson
Much progress has been made in reducing automotive brake noise. It is still an important noise issue for automobiles and is still a problem with trucks and other heavy vehicles. In some cases, it is a critical problem for interior noise and in other cases an exterior noise issue. One has to only stand at a busy street corner for a while to experience the exterior noise issue. The goal of this session is to discuss brake noise issues, measurement techniques, and methodologies to reduce brake noise.
Dr. Thompson is the Chief of the Hearing Loss Prevention Branch of the Office of Mine Safety and Health Research under NIOSH. Dr. Thompson received his BS and MS from Virginia Tech and his Ph D in from Purdue University. He has over 30 publications in national and international journals. He is a registered professional engineer in Pennsylvania, Ohio, and Michigan. He is an Institute of Noise Control Engineering (INCE) Board Certified Noise Control Engineer. He has over 35 years of experience in noise control engineering in several industries with his current focus on mining. Dr. Thompson has served as President of INCE-USA and as Chairman of the SAE Noise and Vibration General Committee. He also is the Managing Editor of Noise/News International and an SAE Fellow.
Sound Package Materials - Pranab Saha
Although the fundaments of sound package material solutions have changed very little since the beginning of the automotive industry, much progress have been made in this area in the past 30 years. Materials and tests have changed with time. This chat will discuss questions related to sound package materials
Pranab Saha, Ph.D., P.E., INCE Bd. Cert.
Pranab Saha is an entrepreneur, co-founder, and the Principal Consultant of Kolano and Saha Engineers, Inc., an independent professional engineering and consulting company in acoustics, noise and vibration control, Michigan, USA. A well-known authority on automotive noise and body interior systems, Dr. Saha has directed and participated nationally and internationally in numerous advanced noise control engineering programs and training seminars for various OEM companies and their suppliers in China, Canada, India, Mexico, and USA. He is a member of various professional organizations, including SAE International. He is the past Chair of the SAE Engineering Meetings Board, SAE Noise and Vibration Conference, and SAE Acoustical Materials Committee (standards committee). He has presented technical papers, organized and chaired numerous technical sessions, and has offered NVH seminars and webinars sponsored by the SAE International and other organizations.
Powertrain Noise, Vibration and Sound Quality - Kalyan Bagga
Automotive Industry has come a long ways to reduce Powertrain Noise and improve Sound Quality. In view of the mandated fuel economy and emission requirements, vehicles are lighter, engines have become smaller and transmissions have more gears. Yet, the customer expectation for Powertrain sound quality and smoothness are higher.
Kalyan (Kal) Bagga, M.S.M.E, P.E. an automotive engineering leader with expertise in Vehicle & Powertrain NVH, Application Sales Engineering and Powertrain Homologation. Currently, he is a Product Development Consultant with Ford Motor Company after working in the Auto Industry for 34 years combined at Ford Motor Company, Chrysler Corporation and Navistar, Inc. He held several leadership positions at Chrysler and Navistar.
Mr. Bagga has been a SAE Member since 1979, has served on the Noise & Vibration General Committee since 1985. He has been the Lead Organizer of the Powertrain Component Session since 1987. He also served as Chairman of the SAE Light Vehicle Interior Sound Subcommittee responsible for the SAE J1477 - Standard to measure the Interior Sound in Light Vehicles. He also served on the SAE Sub Committee for Sound and Heat Insulation Materials responsible for SAE J1400 - Standard to Measurement of Sound Transmission Loss for Automotive Materials. Mr. Bagga delivered lectures on Powertrain NVH to SAE Detroit Section and American Rubber Society. He has published papers with SAE and American Foundry Society. He received best paper of the year award at 1976 Chicago Convention of the American Foundry Society for his paper- Development of Silencer for an Industrial Blast Cleaning Nozzle. He also holds U.S. and International Patents for Navistar V8 Diesel Engine Hydraulic Noise Abatement.
Mr. Bagga holds a Master of Science degree in Mechanical Engineering specializing in Noise Control from West Virginia University and a Bachelor of Science degree in Mechanical Engineering from Indian Institute of Technology- Roorkee, India.
Wednesday, June 24, 2015
Featuring Technical Experts: Dan Maquire, Pete Johnson, Tom Reinhart, and Wade R. Bray
Active Noise and Vibration Control Strategies - Dan Maguire
Active noise and vibration control can take on many forms with even the instances of controlling vibration to reduce noise and vice versa. Certain active control configurations come with performance limitations imposed by the laws of physics, while others do not. A poor mapping of an active control solution to a problem wastes time and can lead people to incorrectly conclude that active control is either difficult or lacking. We will discuss various application strategies to learn more about the costs and benefits to better ensure that an application of active control leads to a positive outcome.
Daniel (Dan) Maguire is an independent consultant in active noise and vibration control. He received a B.S., M.S. and Ph.D. in Mechanical Engineering from Purdue University in West Lafayette. His early work was in the areas of steel mill control systems for Westinghouse Automation and biomedical instrumentation with the Purdue Cytometry Laboratories and the Institute of Hygiene and Epidemiology (Prague, CZ). He has been focused in the area of active noise and vibration control algorithms and embedded software/hardware for over 20 years - with professional positions directed toward automotive/truck, construction, mining, and locomotive vehicles. His latest published work has been in the area of variable sample rate adaptive filtering. In addition to technical aspects of active control, he maintains continued and keen interest in the effects of noise and vibration exposure on human physiology and the validity of federal exposure regulation.
How Seat Design Can Influence Whole Body Vibration and Vehicle Operator Comfort - Pete Johnson
Peter Johnson, PhD, is an Associate Professor at the University of Washington in the Occupational and Environmental Exposure Sciences program, specializing in ergonomics. He earned his Doctorate in Bioengineering from the University of California - Berkeley and has worked as a researcher at the National Institutes of Occupational Health in the United States, Sweden and Denmark. My research interests surround measuring vehicle operators' exposures to Whole Body Vibration (WBV), developing a better understanding of the adverse health effects that may result from exposure to WBV and improving the health, productivity and well-being of professional vehicle operators. Seat technology has not changed much over the past three decades and the technology surrounding vehicle seating and comfort will be undergoing a renaissance in the next decade. I want to share our research, which has identified several new seating technologies that can reduce exposures to WBV and improve operator comfort, health and productivity.
Diesel Engine Noise Reduction - Tom Reinhart
This chat will discuss any questions related to diesel engine noise.
Thomas Reinhart is an Institute Engineer in the Engine Design and Development Department at Southwest Research Institute. At SwRI, he is responsible for management of diesel engine and powertrain design and development projects, in addition to engine noise reduction. Mr. Reinhart has been involved in efforts to reduce engine noise while achieving performance and emissions requirements for over 30 years. Previous roles include Senior Manager for NVH at Visteon Chassis Systems, where Mr. Reinhart was responsible for the NVH analysis and development of axles, driveshafts, and power steering systems. From 2001 to 2004, he was the powertrain NVH department manager at Roush Industries, Inc. where he was responsible for NVH testing and development of diesel and gasoline engines, as well as transmissions, axles, and accessories. Diesel fuel system noise was a special focus of this work. Prior to Roush, Mr. Reinhart was Director of Noise & Vibration Technology at Cummins, Inc., where he was involved in solving noise and vibration issues in engines as well as in a wide variety of engine applications, including light and heavy duty trucks, construction equipment, generator sets, and marine applications. Mr. Reinhart has developed noise reduction features for diesel engines, four of which have been patented. He has published 16 technical papers on Powertrain NVH topics, and holds 4 patents.
Mr. Reinhart received his B.S and M.S. in mechanical engineering from Purdue University. He also spent a year studying automotive engineering at the Technical University of Hannover, Germany. His master's thesis, under Prof. Malcolm Crocker, was on the application of acoustic intensity measurements to diesel engines.
Sound quality 101 - Qs/As', How to hear and identify, then measure appropriately, What causes perception and measurement to disagree or disconnect?, Quantify via co-displayed plural analyses: for example, spectrum vs. time and modulation spectrum - Wade R. Bray
Wade Bray has more than 30 years of experience in a variety of areas of acoustics, including automotive and product sound quality, musical instruments, churches, performing arts venues, theatre sound system and electroacoustic enhancement design, and teleconferencing acoustics. An SAE member, he is active in the Noise and Vibration General Committee (organizing the Instrumentation papers sessions, and the Sound Quality Workshop since its inception).
Since 1987 he has been active in the North American activities of HEAD acoustics, serving as Vice President of the former Sonic Perceptions, Inc. and its successor, HEAD acoustics, Inc. of Brighton, Michigan where he is chief technical officer and provides customer training and support.
Previously he was a senior consultant at Jaffe Acoustics, Inc. (now Jaffe Holden Acoustics) in Norwalk, Connecticut, where his work centered on electronic variable acoustic systems for performing arts venues and full-duplex concealed audio teleconferencing systems for boardrooms and large conference rooms.
He was educated at Arizona State University (Bachelor of Arts in English, Bachelor of Science in Physics, with additional studies in psychology and music). He is a member of the Acoustical Society of America, SAE and the Institute of Noise Control Engineering (INCE) serving as Technical Advisory Board Chair for Perception and Effects of Noise and participating in the Information Technology and Product Noise Emissions working groups.
*Speaker bio and chat details to follow.