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Topic: NVH

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	Internett - Norges veterinærhøgskole
		Universitetet i Oslo (UiO) og NVH ønsker begge en sammenslåing.
		Spørsmålet om NVHs framtidige organisering og lokalisering vil bli besluttet i Statsbudsjettet for 2008.
		Sebrafisk brukes som modellorganisme for å vise hva slags effekt miljøgifter har.
	www.veths.no (376 words)

	Sciemetric - Noise, Vibration and Harshness Testing — NVH Testing for Manufacturers by Sciemetric
		NVH testing catches issues that can affect the performance of the sub-assembly or part over time, creating warranty and recall situations.
		NVH testing has been challenging for manufacturing, since most test systems produce inconsistent results and often fail to detect a significant percentage of noise and vibration defects.
		NVH is used in different applications to catch a range of defects.
	www.sciemetric.com /application_details.asp?id=57 (317 words)

	ETAS - NVH Analyzers Overview (Site not responding. Last check: 2007-10-26)
		NVH Analyzers integrate measurement data from noise and vibration sensors with serial data obtained from a vehicle's engine and transmission ECUs, and then correlates the vibrations or noise with their possible sources.
		For a service technician, the intent is for the MTS 4100 NVH Analyzer to specifically identify the vehicle subsystem that is causing the excess noise or vibration and in many cases, the actual component within that subsystem.
		The Toyota/Lexus NVH Analyzer Kit was the predecessor to the MTS 4100 NVH Analyzer and works in conjunction with the Toyota Diagnostic Tester, a member of the MTS 3100 Scan Tester (Mastertech) family.
	en.etasgroup.com /products/nvh_analyzers (615 words)

	Arctic Cat Unveils its New NVH System (Site not responding. Last check: 2007-10-26)
		NVH lead man Bala Holalkere, an 18-year veteran of sound and vibration engineering with two car makers, will oversee a team of five full-time NVH-dedicated employees.
		This allows NVH engineers to get a reading on the entire unit in simulated trail usage without the contamination of actually standing in the woods with a microphone.
		Currently the NVH is only used by the snowmobile group, however, Cat reps say they have every intention of implementing the small changes necessary to allow usage by the ATV team as well.
	www.maximumsled.com /maximumsled/snowmobile/articles_layout.asp?articleid=278&zoneid=4 (571 words)

	ETAS - NVH Analyzers in detail
		The noise diagnostics function is similar to the vibration diagnostics function but the MTS 4100 NVH Analyzer measures noise from one or two microphones instead of accelerometers that measure vibration.
		A separate NVH signal conditioning module is provided to amplify and filter the accelerometer and microphone signals before they are applied to the MTS 3100 Scan Tester.
		The MTS 3100 NVH Analyzer Kit does not perform drive shaft balancing, does not have the bandwidth or processing speed of the MTS 4100 NVH Analyzer and utilizes a user interface that is less optimized for NVH analysis as it is shared with other scan tester functions.
	en.etasgroup.com /products/nvh_analyzers/in_detail.shtml (476 words)

	2007 Acura RDX - NoiseVibrationHarshnessControlNVH > NVH Overview (Site not responding. Last check: 2007-10-26)
		An urban environment is the ideal setting to test a vehicle’s control of noise, vibration and harshness (NVH).
		Varied street surfaces, construction zones, potholes and other navigational hazards are all effective ways to distinguish true luxury vehicles from the pretenders.
		From engine balance shafts to suspension mounting points to concealed windshield wipers, Acura engineered NVH reduction into the very core of its engine and chassis designs to assure that the RDX driving experience is as refined as it is thrilling.
	www.acura.com /index.aspx?initPath=RDX_Learn_FeaturesOptions_Performance_NoiseVibrationHarshnessControlNVH_NVHOverview (88 words)

	NVH for Production Readiness
		Besides powertrain and component NVH target setting, main design features are evaluated with respect to NVH as they predefine the general powertrain noise and vibration behavior.
		The NVH tasks within the powertrain vehicle integration activities include the layout and NVH fine-tuning of the powertrain mounting system, exhaust and intake systems, driveline, and sound package by means of experimental and virtual development tools and methods.
		NVH experts also assist in the vehicle application and calibration work to achieve excellent drivability in combination with a premium interior noise and vibration comfort.
	www.fev.com /content/public/default.aspx?id=512 (449 words)

	Media.Ford.com: Ford Puts Emphasis on NVH, Refinement and Sound Quality
		NVH enhancements to the Triton engine have led to customer satisfaction improvements on F-150 models, according to internal studies.
		Reducing NVH on the 5.4-liter Triton V-8 was a goal for the Powertrain engineering team for more than two years.
		This not only reduces NVH levels, but also provides a significant benefit to unwanted high frequency noise at locations around the engine where the vehicle is most sensitive.
	media.ford.com /article_display.cfm?article_id=12090 (904 words)

	NVH Symposium abstracts
		In recent years, NVH issues have become a major priority in the vehicle development cycle, since they are strongly connected with customer satisfaction.
		A detailed virtual prototype that has been developed by a combination of multibody dynamics, finite element method, contact mechanics and boundary element technique, introduces a holistic approach in NVH modelling and is used to identify the root causes of clonk.
		The same approach is now extended to the study of other NVH concerns, such as gear rattle, driveline thump and piston slapping noise.
	www.e-i-s.org.uk /NVH_Symposium_abstracts.htm (1767 words)

	Harley-Davidson: the sound of a legend; NVH technology helps deliver what riders want to hear - Product - noise, ...
		NVH leaves in the desirable sounds while damping out whines, whirs, ticks, knocks, and other unwanted mechanical noises.
		NVH is included in product development at its inception where all the processes can be tied together: design, predictive analysis development, and validation.
		Closed to the public as well as most of the non-engineering personnel at the company, the first stage of the facility was completed in 1997 as one of the top NVH test facilities in the world.
	www.findarticles.com /p/articles/mi_m3012/is_11_182/ai_95614097 (877 words)

	New design techniques for improving diesel NVH characteristics - noise, vibration and harshness Diesel Progress North ...
		Concerns about the NVH characteristics associated with diesel engines are becoming increasingly prevalent and have become a greater consideration in product development and purchasing decisions.
		Moreover, through the application of combustion data from a similar engine, it is possible to compare the NVH characteristics of the "paper engine" with other engines in the same class to provide a preliminary design assessment, before the existence of prototype hardware.
		Potential improvements in the NVH characteristics of the head are also evaluated in comparison with cost and weight concessions.
	www.findarticles.com /p/articles/mi_m0FZX/is_n6_v63/ai_19735545 (844 words)

	Mustang Dynamometer >>> NVH
		Whether your application involves interior or exterior NVH, Mustang Dynamometer has an equipment solution to meet your needs.
		NVH test stands available include roller test beds with diameters from 30” to 72” and direct HUB connection style test beds for applications that require elimination of tire generated NVH.
		Mustang has the ability to accommodate your NVH needs in a professional fashion, and can deliver a functional test bed to your facility in a fraction of the time and for less money than most other manufactures.
	www.mustangdyne.com /nvh.htm (233 words)

	NVH Brake Dynamometer
		At the same time, brake NVH dynamometers must permit detailed studies of the braking dynamics and noise generation process to provide the information necessary for improving performance.
		In addition, these enclosures are designed to represent the on-vehicle environment with a reflecting floor plane and absorptive walls to simulate a free field over a reflecting plane as found on the open road.
		A typical NVH data acquisition and analysis system provided with the dynamometer is shown here.
	www.linkeng.com /nvhbrakedyno.htm (709 words)

	MSX International - Engineering Services Americas - Computer Aided Engineering - NVH (Site not responding. Last check: 2007-10-26)
		NVH is an important vehicle attribute in today's automotive market.
		The automotive engineering community relies on NVH testing and NVH CAE to ensure that the vehicles produced are quiet (Noise), that vibrations of the moving components on the vehicle are not transmitted to the body of the vehicle (Vibration) and that the interior of the vehicle is insulated from the road induced vibration (Harshness).
		CAE allows to analyze the NVH attributes before the first vehicle prototype is built, allowing engineers to understand the problems and identify solutions early in the design process.
	www.msxi.com /engineering/cnvh.html (300 words)

	Noise, Vibration, and Harshness Enterprise
		On Wednesday, March 21, Michigan Tech and the NVH Enterprise excitingly welcomed four members of Volvo Construction Equipment to Michigan Tech to tour the campus, and to see face to face what the NVH Enterprise was currently working on for their company.
		During their visit the NVH Enterprise was able to give them a tour of the current facilities that are being used to work on the projects for their company.
		Volvo Excavator Cab Stand Project One of the projects for the NVH Enterprise this semester is the construction of a stand to mount a 20 ton excavator cab.
	www.enterprise.mtu.edu /nvh (721 words)

	NVH: Automotive NVH
		There are two distinct categories of NVH issues for automobiles and trucks.
		The other major category is the external NVH or environmental noise.
		The primary concern is the noise radiated to the environment and its relation to noise regulations.
	www.linktestlab.com /autonvh.htm (450 words)

	"Speeding Automobile NVH Analysis", M.E. Online, Feb. 16, 2007
		The WBS method is ideal for NVH optimization of body panels that are assembled together with spot welds, according to Misubishi and LMS.
		The second approach, modal projection of design modifications, is used for the optimization of vehicle NVH performance for small modifications, typically during the refinement phase of the development cycle.
		The body areas whose modification is expected to have the most impact on NVH are identified from a weak spot detection analysis and a set of nominal modifications is defined.
	www.memagazine.org /contents/current/webonly/wex021607.html (1507 words)

	Brake NVH -- Part I
		Now, NVH is as much of a study of the mechanical world as it is of human senses.
		These vibrations are then transmitted to the fluid of the inner ear, where they are converted into electrical impulses, which the brain receives and interprets as sound.
		This transmission and conversion of sound waves into nerve impulses is one of the cornerstones of understanding NVH and brake noise.
	www.tirereview.com /?type=art&id=5156 (1796 words)

	Automotive NVH - Brüel & Kjær
		Whether its powertrain, exterior vehicle, interior vehicle or chassis NVH testing, and whether its in a test-cell, on a test-track, model update, benchmarking or troubleshooting, we have the complete range of customer-driven solutions for you.
		With one Windows-based test platform, from the transducer to documentation, we provide the innovative, user-friendly vibroacoustic tools you need for efficient NVH testing high quality data and data management to help you meet ever more demanding targets.
		Together with our partners, we cover the complete spectrum of NVH test solutions.
	www.bksv.com /2979.asp (163 words)

	Mazda 3 upgrade tackles NVH, safety issues - A closer look - Motorshow
		Sound insulation has been added under the bonnet- and boot-lids, and on the roof in an attempt to reduce NVH (noise, vibration and harshness).
		He said acceptor/rejecter studies did not highlight any issue with NVH, though Mazda product manager Amanda Chase admits it was a "major customer complaint".
		"Elimination of NVH was a major focus of the Mazda3 update," said Chase.
	www.smh.com.au /news/a-closer-look/mazda-3-upgrade-tackles-nvh-safety-issues/2006/07/14/1152637842502.html (480 words)

	Turning NVH into a Competitive Advantage Sound and Vibration - Find Articles
		Developing components, subsystems and the complete vehicle to the required levels of noise and vibration characteristics by using computer-based simulation, testing and analysis tools is referred to as NVH (noise, vibration, harshness) engineering, representing one of the most complex and strategically important aspects of automotive development.
		This is certainly true for the suppliers of components such as mounts, bushings, exhaust systems and trim that directly contribute to the NVH characteristics of a car.
		This way, suppliers of components where NVH is not a primary product attribute might suddenly be confronted with NVH aspects because of their increased responsibility for all aspects of their component or subsystem.
	findarticles.com /p/articles/mi_qa4075/is_200409/ai_n9458492 (754 words)

	nvh
		NVH (noise, vibration and harshness) is an overall measure of the ``feel'' of a vehicle reflecting the noise level, vibration, and harshness felt while driving.
		NVH has become an important part of an automotive quality indicator with the customer's perception of quality being based, in part, on sound levels in the passenger compartment.
		With the introduction of weight-saving under-hood components, and emphasis on passenger compartment noise levels, the problem of flow-generated noise, both interior and exterior, has become an important issue for the automotive industry.
	www.me.unm.edu /~christon/nvh/nvh.html (347 words)

	NVH
		This NVH program is headed by PhD students Colin Novak and Helen Ule; who are keen on finding out the exact pleasantness and unpleasantness of sound, which is known as psycho acoustics.
		The University of Windsor’s NVH program will be engaging in further research with an Asian company to develop acoustically optimized automobile cabin fans.
		The Noise, Vibration and Harshness--Sound Quality Group, as an entity within the Department of Mechanical, Automotive and Materials Engineering, has a commitment to the pursuit of excellence in education, research and partnership with industry as it pertains to noise and vibration control and sound quality.
	www.uwindsor.ca /units/AutoGateway/autogateway/labs.nsf/proslabview/4A2EF3A26DA1CDF185256F2D0053DFF6 (413 words)

	Shake, Rattle & Roll: DIAGNOSING NVH COMPLAINTS Motor - Find Articles
		NVH diagnosis, just like driveability diagnosis, can be interesting, challenging, frustrating...and darn near impossible at times.
		Here are the key components for success: First, the technician responsible for repair rides with the owner to duplicate and hear and/or feel the NVH problem.
		The NVH check sheet needs to answer the classic journalistic questions of who, what, where, etc. The check sheet helps the customer describe the NVH problem (the what): Is it a clunk, clank, squeal, rattle, growl, grinding noise, etc? Also, what work has already been performed on the vehicle?
	findarticles.com /p/articles/mi_qa3828/is_200606/ai_n17177305 (906 words)

	NVH and Torque Testers identify root causes of defects., Sciemetric Instruments Inc
		NVH and Torque Testers identify root causes of defects.
		Historically, NVH testing has intimidated manufacturers because of its complex nature and the unreliable results delivered by subjective and inconsistent testing methods such as human response and traditional acoustics measurements.
		SigPOD NVH is the industry's first sound and vibration monitoring system made for the assembly manufacturing environment and is a self-configurable, easy-to-use system that simplifies the implementation of complex NVH testing.
	news.thomasnet.com /fullstory/802737/rss/2697 (1132 words)

	The Ohio State University and General Motors
		The goal of this course is to give the student a solid understanding of the automotive NVH problems and issues involved in the design of contemporary vehicles.
		The NVH course sequence is based on an innovative case study approach, and it attempts to enhance critical thinking skills while relating NVH issues to design, manufacturing, material, performance, and economic considerations.
		Chief goal of this course is to prepare students for the Automotive NVH course sequence.
	rclsgi.eng.ohio-state.edu /~singh/NVH.htm (2633 words)

	MTU Keweenaw Research Center - Noise Vibration Harshness
		Projects involving anything from dishwashers and snowmobiles to large tracked vehicles and satellite dishes have been part of the long history of NVH studies.
		Combined with other assets of KRC such as computer based modeling and analysis, vehicle testing and evaluation and the University, investigation and solution of NVH related issues is integrated, highly efficient and effective.
		Examples of our NVH projects include documenting the vibration characteristics of the U.S. Army's M1A2 Abrams Tank, quieting the cab of off-highway equipment, eliminating vibration in wood production machinery, and redesigning snowmobile suspensions for a smoother ride.
	www.mtukrc.org /nvh.htm (315 words)

	Dorrie :: NVH Squeak Tape
		Dorrie's Noise, Vibration and Harshness (NVH) Tape is a Pressure-Sensitive Adhesive (PSA) backed flocked fabric material designed to reduce or eliminate noise and squeak problems from the interior of cars.
		NVH Squeak Tape ships standard on a spool and is also available in precut, ready-to-apply pieces.
		In addition to our standard NVH product, we also offer a weatherable version for exterior applications.
	www.dorrie.com /nvhtape/nvhtape.htm (106 words)

	Noise, Vibration and Harshness (NVH) Testing Facilities – Automotive
		Integrating the structural components, dynamometer and data acquisition systems unique to NVH testing requires an experienced and trusted partner.
		ACS provides this expertise and a single source for entire project responsibility, from single environmental chambers to NVH technical centers.
		With experience ranging from hemi to full anechoic chambers and pass-by rooms, ACS has the capabilities, the technical knowledge and the delivery model to provide state-of-the-art NVH facilities for the most perceptive customer.
	www.acscm.com /markets/NVH.aspx (90 words)

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