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itute kick off pilot small biz adoption of am in automotive accelerating nikon slm solutions teams up with xpertos3d massivit launches rapidwings manufacturing platform america makes to host 14th annual mmx in ohio stratasys unveils rail ready flame retardant fdm material tdk corp set to acquire fabric8labs more additive manufacturing digital thread digital thread plm internet of things compliance digital twin collaboration all digital thread top story accenture acquires industries excellence group acquiring siemens partner will boost product development and supply chain optimization services for manufacturing clients latest in digital thread oreca picks siemens xcelerator to enhance performance motorsport design dassault systèmes uk fusion energy advance uk s prototype fusion power plant eagle point software markedup ai announce partnership digital twins and simulation poised to support atlanta s world cup operations annual arc automotive research center review demonstrates how digital accenture acquires industries excellence group robots fit in factories but not hospitals and schools study finds ptc reveals wave of ai infused product innovations more digital thread engineering computing engineering computing workstations graphics hpc cloud computing cluster computing peripherals engineering resource center servers and data centers storage it services all engineering computing top story unleash ai innovation the power of nvidia rtx pro 6000 blackwell workstation experiment prototype and innovate with ai latest in engineering computing supermicro provides nvidia blueprint for converged hpc and ai infrastructure xvisio technology unveils spatial computing devices for xr amd rackspace technology ink agreement rescale u s national labs form initiative cadence collaborates with intel foundry physicsx raises 300m in series c investments to advance physics ai analyst reports gpu shipments down in q1 2026 onlogic presents computing solutions for maritime operations more engineering computing press subscribe subscribe browse latest magazine archives subscriber services latest magazine digital engineering june 2026 in the latest issue of digital engineering we focus on automotive design innovations including light and sound simulation additive manufacturing applications our editors head to nvidia gtc and rapid tct and we investigate whether you can latest special issue may 2026 special focus artificial intelligence in design and simulation in this special focus issue learn about the latest developments in the integration of artificial intelligence into engineering workflows previous special issue april 2026 special focus issue generative design in this special focus issue digital engineering takes a look at how generative design solutions can be used across different types of design problems and with a variety of manufacturing approaches to accelerate design space exploration and press releases home topics design acoustics is your car a good listener is your car a good listener breaking down the role of acoustics analysis in electric and autonomous vehicle development related podcast subscribe via itunes or spotify and don t miss a beat audio podcast is your car a good listener duration 0 9 11 hrs min sec listen now latest podcasts what s your pawn sacrifice or fork attack in the manufacturing chessboard tim costa nvidia discusses enthusiasm for ai integration among cae vendors editor s chat additive manufacturing strategies show amug assess nvidia gtc and solidworks ceo manish kumar on ai powered companions more podcasts find us tune in to digital engineering 24 7 s podcast and get engineering news products and analysis from industry experts delivered in real time follow us on these popular platforms apple podcasts amazon music via rss iheart radio spotify source ansys in 2018 ansys acquired optis an optical simulation software maker the technology is now incorporated into ansys vrxperience sound image courtesy of ansys latest design news oreca picks siemens xcelerator to enhance performance motorsport design engys aids in aerodynamic development of shell concept car zwcad professional cad for innovators unveiled dassault systèmes announces aakruti competition for students mecsoft presents camjam 2026 ai data centers lost in space gravity sketch releases screen updates more design latest design resources may 2026 special focus artificial intelligence in design and simulation in this special focus issue learn about the latest developments in the integration of artificial intelligence into engineering workflows april 2026 special focus issue generative design in this special focus issue digital engineering takes a look at how generative design solutions can be used across different types of design problems and with a variety of manufacturing approaches to accelerate design space exploration and more resources by kenneth wong september 15 2020 human drivers are trained to rely on visibles and audibles to make split second decisions an emergency vehicle s siren unusual mechanical noises from the engine and the loud bells from railroad crossings are just a few of the auditory alerts that might prompt a sudden change in driving strategy so when the human driver is removed from much of the decision making process in autonomous vehicles who is listening your car is as it turns out there s a specific discipline that studies the noise vibration and harshness nvh of the vehicle in classic automotive design the noise refinement goal is primarily to reduce the level of undesirable noises in the car s interior if your engine noise is too loud you won t be able to enjoy the latest taylor swift single streaming from your smartphone for example but with the emergence of self driving cars the discipline takes on new burdens one is teaching the car to listen listen to the recorded podcast with the speakers quoted below view or stream simulation of sound propagation inside a car s cabin image courtesy of comsol a multiphysics approach mads jensen technical product manager for acoustics at comsol is someone who listens to your future car s hums and whispers he points out the reversal of acoustic engineering the shift from noise cancellation to noise amplification with the emergence of electric vehicles the autonomous car itself has to react to the environment that means the microphones in the car have to be placed properly to hear the environment better siva senthooran director of technical sales at simulia centers of excellence in different countries and regions the car is required to make a certain level of sound so the pedestrians can hear it approaching so with electric cars which do not have a noisy combustion engine you now have to actually emit sound with loudspeakers to meet that requirement explains jensen modeling the outbound acoustics of the car such as sound emitted from the car s speakers can be done with the acoustic module in the comsol multiphysics software suite acoustics can be coupled with other physical effects including structural mechanics piezoelectricity accumulated electric charge and fluid flow according to comsol s product details page a lot of the car makers are modeling the acoustics inside the car as well it s a relatively small acoustic space but a complex environment you have people and objects so you have to use multiple speakers to create sound zones inside the space jensen says imagine a fully autonomous van in which the driver has the option to turn around for chitchat with the passengers sitting in the back the optimal speaker placements for such a vehicle are significantly different from a typical family van where everyone is facing the front for the most part to figure out the optimal configuration of speakers and sound zones for such a space you really need to rely on simulation adds jensen by itself sound propagation is not multiphysics however the mixture of electromagnetics structural vibration and sound fields to account for the behavior of the speakers makes the simulation multiphysics a specialty of comsol s simulation technology jensen points out though electric cars do not have a combustion engine they do have an electric motor which generates certain noise and vibration these sounds can propagate through the vehicle s body to create unwanted sound inside the cabin jensen says when you have sound fields interacting with the car s structure it s a multiphysics problem raytracing for sound simulation engineers traditionally use finite element analysis fea methods to model the wave fields inside the vehicle and solve simulation in the frequency domain or time domain jensen explains are all autonomous vehicles electric autonomous isn t synonymous with electric things get muddled in the intersection of profitability fuel economy and innovation according to the paper tradeoffs between automation and light vehicle electrification from nature research the authors mohan sripad and others point out automation will likely reduce electric vehicle range by 5 10 for suburban driving and by 10 15 for city driving the intense computing power required to process natural language commands lidar and video signals for image driven decision making and other factors adds to the battery drain in autonomous cars with this approach you need a lot of discrete points or mesh elements to resolve the wavelengths so it s computationally expensive with the latest development in comsol software you can now run the full wave approach to a much higher frequency both computational methods and computational power are improving says jensen an improvement in the software is the use of time explicit discontinuous galerkin method this allows you to model wave propagation in the time domain says jensen this approach is extremely suitable for parallel computing the latest strategy is to employ a hybrid approach a mix of full wave simulation and raytracing with raytracing you can think of soundwaves as particles traveling like rays when it hits a surface it bounces back but some energy is also absorbed by the surface depending on the surface s porous or smooth texture says jensen that s an inexpensive way to model acoustics inside a confined space an important step in the acoustic simulation is the treatment of the cad geometry which defines the space in which soundwaves propagate the better you can prepare your cad geometry for meshing and simulation the more accurate your simulation is says jensen too quiet for safety ales alajbegovic vice president of worldwide industry process success services at dassault systèmes simulia recalled a cab ride to the munich international airport the cab driver was complaining about the loud wind noise but the wind was not particularly strong that day when you remove the noise of the combustion engine the noise inside the cabin is reduced significantly but as a result you start to notice other noises like wind noises and much more he observes in many cases they may be even more bothersome than a car with a combustion engine wind noise simulation showing turbulence and the resulting acoustic waves on glass panels image courtesy of dassault systèmes wind noise comes from aerodynamics or the friction between the airflow around the car and the car s chassis itself therefore the shape of the car is crucial to what you hear in the cabin says alajbegovic one way to minimize it is to reduce drag by modifying the shape of the chassis the geometry of the car the autonomous car itself has to react to the environment so in addition to seeing using real time video feed and computer vision it also has to listen to what s happening around it that means the microphones in the car have to be placed properly to hear the environment better says siva senthooran director of technical sales at simulia centers of excellence dassault systèmes offers several tools for aerodynamic simulation and geometry modeling in its 3dexperience product line powerflow software based on transient lattice boltzmann based physics includes features for thermal aerodynamic and aeroacoustic simulation the company also offers wave6 software for vibro acoustic and aero vibro acoustic simulation and abacus a structural analysis suite can you hear your car in may 2018 ansys acquired optis an optical simulation software developer subsequently ansys also acquired genesis an acoustic simulation software developer the new acquisition enables ansys software to generate not only visual representation of sound fields but also the audio in theory what you would hear inside the vehicle the electric vehicles are quiet maybe too quiet so secondary noises like hatchback noise and duct effects become clearly audible also the electric motor has a fast rotation which creates a whining sound says patrick boussard senior manager product management at ansys boussard is also the founder of genesis before its acquisition because the car is too quiet any squeak or creak from the panels or misalignment in the windows gets noticed there s nothing to drown out these sounds says siddharth shah principal product manager ansys acoustic analysis gets more complex in combining autonomous driving and the quieter electric powertrains with the need to focus less humans in the autonomous vehicles are more likely to listen to music watch a movie engage in conversation or even take a nap that means the vehicle needs to create a variety of sounds to alert the passengers to lane changes emergency stops and the need for someone to assume manual control using ansys vrxperience sound users can virtually experience the cabin of a car still in development visually and auditorily it adds signal processing so you can hear all the sounds from different audio sources in a surround environment explains boussard what you can do with vrxperience is to assess the sound says shah with it you can tell whether you increase the sound by a certain decibel if you make changes to the mirror the vent or the profile of the car for example in autonomous cars the in cabin audio experience takes on new importance as drivers and passengers may demand a better environment for entertainment movies music and conversation for example but the car must now also learn to listen and react to the sound signals the drivers may not be actively listening to listen now more about dassault systemes dassault systèmes the 3dexperience company is a catalyst for human progress we provide business and people with collaborative virtual environments to imagine sustainable innovations the 3dexperience platform enables companies to create and electrum utilizes the 3dexperience platform on the cloud to develop their new electric motorcycle electrum a new brand of electric motorcycles utilizes the 3dexperience platform their mission is to support indonesia s shift to low carbon sustainable transport and to ultimately help the country s government achieve its vision of net zero carbon emissions by 2060 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