Join in Weds. evening for fundamental NVH Source-Path-Receiver concepts at the 2019 Structure Borne NVH Workshop. Since its inception in 2003, the SB NVH workshop has been a primer for the newly initiated NVH Engineer covering isolation and attenuation principles including practical methods for reducing noise and vibration. A theoretical foundation will explain low-frequency NVH, below 100 Hz, and mid-frequency, up to 500 Hz, with guidelines for performance achievement. Experience the acclaimed “NVH Toolbox” with a “hear it live” demo. The seasoned Engineer will benefit from a comprehensive review of NVH principles. Recent advances in NVH technology will be discussed to guide emerging Electric Car propulsion issues.
The Sound Quality Workshop 2019 will begin (about 20 minutes) with a new, unique step back from the usual foreground topics of sound quality to consider “the forest instead of the trees”: what the human brain on Soundscape does, to reset understandings. A human practically cannot hear without mental assemblies affecting every heard event and its meaning. This cannot be described in a short outline but will be clear on presentation. The author gave an invited paper at InterNoise 2018 Chicago -- very well attended and received, considered new, now invited for international publication in an expanded version. It has been urged that this be taught to introduce the practice of sound quality engineering to clarify for any sound quality engineer what happens in perception and what to do.
In many industries, muffler and silencer design is primarily accomplished via trial and error. Prototypes are developed and tested, or numerical simulation (finite or boundary element analysis) is used to assess the performance. While these approaches reliably determine the transmission loss, designers often do not understand why their changes improve or degrade the muffler performance. Analyses are time consuming and models cannot be changed without some effort. The intent of the current seminar is to summarize a) plane wave simulation techniques, b) numerical simulation using finite and boundary element methods, c) analysis of catalysts and diesel particulate filters, d) source models, e) muffler testing, and f) special concerns for the analysis of large silencers.
The Acoustical Materials Workshop will cover fundamentals of acoustical materials and basics of noise control for engineers who are new in the field of noise and vibration. It will also discuss application examples to reduce noise in electric vehicles and Class A vehicles by experts from the automotive industry.
Pass-by Noise regulations are evolving as they are adapted to match constantly changing vehicles and driving conditions. Test methods are becoming more complex with a change in the driving and vehicle conditions. Also, worldwide, the trend is towards a reduction in the maximum acceptable levels driven by latest regulations put in place in EU and Japan. Front loading pass-by noise engineering early during the vehicle development process is becoming ever necessary as OEMs are competing to reduce the vehicle development cycle and the time to bring new vehicles to market. During this workshop, we’ll present the engineering solutions available to support the vehicle development with a focus on noise requirements. After introducing the regulations for field pass-by noise, indoor pass-by noise and minimum noise for electric vehicles, we’ll present the challenges posed when trying to meet these regulations together with other internal or customer requirements for sound quality and performance.
A vast range of signal processing methods are common, when measuring and analyzing NVH data, using today´s systems. Digital data is the foundation and hence, the conversion from analog to digital (and sometimes even back to analog) becomes important tasks. The question: “what is the correct sampling rate” is frequent and there are many myths that will be discussed and put to bed. The same goes with filtering, FFT analysis, time domain methods, measurement systems etc. The workshop will outline multiple easy to use methods that will help in understanding measurement quality and how to reach the goals, with the proper accuracy. A focus on “no-box” approaches will expand your toolbox for NVH measurement and analysis!
The scope of the workshop is to provide a high level of understanding of the hybridization and electrification technologies implemented in the recent vehicle platforms. It also covers the complexity of the hybrid and electric architecture in conjunction with their corresponding components such as the battery pack, motors and power electronics. Finally, it steps the participants through the noise and vibration issues concerning the electric vehicle.
This session is devoted to NVH topics for marine and land-based vehicles such as personal watercraft, motorized bikes, snowmobile, or any such recreational activity . Potential topics would include any NVH development issues pertinent to vehicle propulsion system, drivetrain, noise or vibration target-setting for consumer perception and measurement methodology.
This session addresses the strategies and methods for implementing active noise and vibration control, including sound enhancement, in a vehicle. It will cover sensors and transducers, feedback systems, control algorithms, software for active control, noise and vibration cancellation devices, noise and vibration measurement systems, and case studies.
This session covers innovative methods, tools, and processes for reducing aircraft interior noise. Abstracts focusing on lightweight solutions to interior noise and vibration issues are being sought. All aspects of vibro-acoustic studies to reduce cabin noise are welcome in this session. Potential topics may include experimental methods or findings, analytical predictions and correlations, source mitigation, vibro-acoustic package design, sound quality metrics, noise and vibration troubleshooting and resolution, or practical applications of advanced lightweight aerospace materials or technologies.
The purpose of this session to engage in dialogue on the challenges that face vehicle NVH development, and the development process used to achieve NVH goals and includes topics such as benchmarking, target setting, target cascading, the role and timing of simulation methods and test methods and cross functional coordination and optimization. Papers in this session will also explore the relevance and timing of component, subsystem and full system analysis and testing.
This session is searching for manuscripts on both numerical and experimental work pertaining to noise caused by air flow around vehicles or stationary machines. Potential topics could include: flow-induced interior noise, flow over protrusions, sunroofs, windows, cooling fan noise, or flow noise in exhaust or intake systems.
This session is looking for manuscripts that focus on analyzing, testing, and developing solutions to minimize the noise and vibration from braking systems. Tools that can be discussed include but are not limited to analytical modeling, experimental testing and predictive correlation. New techniques for the design of brake systems to prevent noise issues are of particular interest.
This session is focused on the vehicle body interior noise issues caused by friction and/or impact due to the vibration of interfacing components. The papers in this session will investigate those issues through the best practice of analytical and experimental applications.