Ansys Sound: Acoustic Analysis and Sound Design

Ansys Sound enables you to listen to, analyze and design sound sources based on real acoustics measurements or acoustic simulation results (CAE NVH). The solution offers an innovative post-processing tool to predict and assess noise and vibration via human hearing, from the earliest stages of virtual product modeling or based on a given measurements database. It is able to link sound to driving simulators, flight simulators and virtual reality platforms. Ansys Sound paves the way to target sound definition, brand sound creation, subjective and objective measurement, component separation, and troubleshooting.

Ansys Active Sound Design for Electric Vehicles (EV) NVH

Active Sound Design for Electric Vehicles (EV)

Electric vehicle (EV) and autonomous vehicle (AV) manufacturers create signature sounds for their cars (including engine noise) to enhance vehicle appeal and give listeners a feel for the speed and acceleration. Using cutting-edge sound enhancement techniques, automakers are introducing new, customized sounds for their vehicles. These techniques augment natural vehicle sounds by playing synthesized sounds synchronized with the vehicle’s real-time data over the vehicle’s speakers. Ansys delivers in-vehicle sound design and tuning that is designed to predict, test and validate the future soundscape of vehicles in real-world driving conditions, to ensure that EVs provide the optimal sound experience.




E-Motor Noise, Vibration and Harshness (NVH)

Simulating the noise, vibration and harshness (NVH) of an electric motor is important for proper electromagnetic (EM) and vibro-acoustic design of electric vehicles (EVs). Ansys’ solutions can characterize the NVH effects of an electric motor early and accurately in the design cycle to improve vehicle performance and safety. These solutions lower development costs and help support electric mobility (e-mobility) — an application resulting from electrifying transportation. Ansys’ solutions enable EV carmakers or other e-motor integrators to optimize the sound perception and performance, improve customer satisfaction and gain competitive advantage in the transportation and industrial sectors. 

How can Simulation Reduce Automotive Noise?

Aeroacoustics simulation helps predict the combined impact of noise sources on the overall sound level in specified locations — for instance, the driver’s seat. Being able to predict noise enables designers to make modifications on car details (e.g., side mirror shape, some door gaps, vents, etc.) and materials to comply with regulations and improve the comfort of the passengers.

Ansys Fluent can solve complex aeroacoustics problems and provide an extensive set of modeling options and post-processing capabilities to improve acoustic design using a variety of methods:

  • Broadband noise methods, where the steady solution is used as basis for noise source estimation.
  • Acoustic analogy methods, where the computational fluid dynamics (CFD) solution is decoupled from the sound propagation via wave equation solutions.
  • Direct methods (i.e., direct computational aeroacoustics), which fully couple the calculation of unsteady flow and acoustic fields.

In the latest Ansys software release, 2022 R1, Ansys has introduced a new acoustics workflow that couples Ansys Fluent CFD simulations to Ansys Sound. This enables engineers to use advanced acoustics analysis techniques to analyze the acoustic pressure signals computed by CFD, including:

  • Sound files that let you listen to simulated sounds.
  • Reports on volume, tonality, sharpness, and articulation.
  • Translation of pressure signals to see acoustic indicators by location.
  • Multiple frequency functions for sound composition.
Ansys Active Sound Design for Vehicles Aeroacoustics CFD Fluent
Ansys Active Sound Design for Vehicles Aeroacoustics CFD Fluent Maxwell

How to Listen to an Acoustic Simulation

Let’s say you want to assess the noise of an electric vehicle. The major components of the powertrain that contribute to the product’s sound are the motor and gearbox. So, to assess the sounds you first use multiphysics workflows that simulate these systems.

The motor electromagnetics can be simulated using Ansys Maxwell and Ansys Mechanical while the gearbox motion can be simulated using Ansys Motion. The information from these models can then be sent to Ansys Sound so engineers can listen to the product. From there, they use these simulations to tweak the design’s performance and its sounds.

As the engineers learn more about their designs, they can expand the simulation to dig into the sound sources from the electric motor itself. This multiphysics workflow could include the structural analysis of static loads, electromagnetic forces, vibration analysis and acoustic noise radiation.

Ansys Active Sound Design for Vehicles Aeroacoustics CFD Fluent Maxwell2

Predict and Assess Noise and Vibration at the Earliest Stages Through Virtual Product Modeling


Sound Analysis, Management and Playback

Perform temporal, spectral and time-frequency graphical analysis of sound and induce modifications on the signal.
Enable the filtering and comparison of sound signals and separate the signals into several components based on state-of-the-art algorithms that capture de-noising, tonal components, transient parts extraction and the mixing of all components. It is possible to track and isolate whistling, whine and any other pure or harmonic frequency. Shocks, ticks, clicks, explosions and every kind of impulsive sounds can be isolated using the transient detection component of the sound module within Ansys Sound.

Harmonic Exploration and E-Motor Sound Analysis

Work with sounds and signals exhibiting harmonic content and employ tools related to orders of rotating machines.
Explore the possibilities of detection or association of an RPM profile to a signal and calculation of order analysis. The RPM signal can be derived from a recorded tachometric signal or pulse signal. Or, extract and create using the integrated tools within Ansys Sound for harmonics detection in the time frequency representation. The power of these tools doesn’t require a specific sensor device, such as a rev counter, to carry out harmonic order analysis; for E-Motor you can also isolate with few clicks, the PWM (pulse width modulation) tones.

Sound of Multiphysics Simulation Results

Listen to Ansys Mechanical, Ansys Fluent, Ansys LS-DYNA and Ansys Motion simulations calculation results and create sound from spectra or waterfall resulting from mechanic, aerodynamic or fluid simulations.
You can listen to the sound from the acoustic simulation of an electric motor dynamic model and then modify sounds to evaluate effects of level changes on components, all while running a study on sound quality.

Psychoacoustics and Sound Quality

Multiple psychoacoustics criteria are monitored—often required for initial qualification of sound quality— and advanced measurements of these metrics are recorded for listening tests.
Joint research involving teams from Ansys and the CNRS LMA research laboratory are used for quantifying impulsive sounds’ loudness. The psychoacoustic feature of Ansys Sound can perform the equalization of a set of signals to reach a specific common indicator, for loudness equalization.

Listening Tests for Sound Perception Measurement

Evaluate the sound quality of your product with Ansys Sound, by measuring sound perception through jury testing experiments.


Immersive Driving Simulator Sound

All sound sources get managed and accurately modeled and configured in the included interactive sound generator for driving simulators.
This includes powertrain (ICE, Hybrid or EV), aerodynamic noise, rolling noise, screeching tires, HVAC, traffic and more, offering an advanced real-time audio synthesis tool for a generation of car-related sounds. Sound is designed to integrate into driving simulators and virtual reality platforms. With an open database, customized car sounds can be created and integrated into the software. The software’s synthesis technique consists of generating sound sources according to real-time events within a given scenario, so when the driving conditions change, the synthesis algorithms match the new conditions, and each sound source evolves accordingly. With the loudspeaker set up to match the customer’s facilities and on-site calibration and equalization, achieve optimal realism.

Engine Sound Enhancement and Active Sound Design

Ansys Sound provides the Active Sound Design (ASD) comprehensive solution for engine sound enhancement (ESE) for electric vehicles (EVs) and internal combustion engine (ICE) cars.
Active Sound Design technologies can create an atmosphere to make the vehicle more alive, more attractive and safer thanks to audio feedback while driving. This is used for ICE engine cars and EV, including AVAS and ADAS sound.



We pride ourselves on empowering each client to overcome the challenges of their most demanding projects.

Enteknograte offers a Virtual Engineering approach with FEA tools such as MSC Softwrae(Simufact, Digimat, Nastran, MSC APEX, Actran Acoustic solver), ABAQUS, Ansys, and LS-Dyna, encompassing the accurate prediction of in-service loads, the performance evaluation, and the integrity assessment including the influence of manufacturing the components.

Aerospace Engineering: AeroAcoustics and VibroAcoustics Simulation

Acoustic simulation helps aircraft manufacturing companies to analyze and detect the sources that create noise. It can be used to study the noise flow and the paths that it uses to reach the receiver. Enteknograte engineers offers the best available tools and unmatched consulting experience in: Fuselage and cockpit insulation assessment and optimization, Engine nacelle liner design, Environmental Control System noise propagation in air distribution duct, Ramp noise, Broad-band aero-acoustics, Acoustic fatigue

AeroAcoustics and VibroAcoustics in Automotive Industry

Even low noise levels can significantly degrade the comfort for the user. AeroAcoustics help us to predict and understand how to design quiet workplaces, quiet car and aircraft interiors, or silent electronic devices. In the next level, in order to study the interaction of structural vibration with the adjacent fluid, it is necessary to model the acoustic behavior of the involved structural components and VibroAcoustics aspects.

NVH & Acoustics for Hybrid & Electric Vehicles

In NVH Engineering and simulation of Hybrid/Electric Vehicles, the noise from tire, wind or auxiliaries, which consequently become increasingly audible due to the removal of the broadband engine masking sound, should be studied. New noise sources like tonal sounds emerge from the electro-mechanical drive systems and often have, despite their low overall noise levels, a high annoyance rating. Engine/exhaust sounds are often used to contribute to the “character” of the vehicle leads to an open question how to realize an appealing brand sound with EV.

Structural Dynamics Integrity & Vibro-Acoustics Simulation for Marine & Shipbuilding Industry

CFD, Finite Element Method (FEM), Statistical energy analysis (SEA) & Boundary element method (BEM)
Structural-borne noise and vibration need to be minimized for passenger comfort and reduced environmental impact. Our full suite of vibro-acoustics simulation, and optimization tools ensures that we can minimize the structural dynamic impact of your vessel and its components early in the design phase. From large cruise ships to yachts, from frigates to submarines, many design challenges shall be addressed in the design phases of marine applications. If on the one hand the exterior noise, due to propellers, hull radiation or muffler, has to be limited for discretion or environmental reasons; on the other hand, interior noise is of concern for crew and passengers' comfort.

Audio Device Design: Acoustic simulation for Sound Quality Analysis in Consumer Electronic Devices

When designing an audio device, the most important thing for an engineer to consider is the quality of the sound. From loudspeakers to headsets, from hearing-aid devices to digital cameras the sound quality is of primary importance and shall be carefully evaluated while designing such applications. A set of predictive numerical tools are thus needed to efficiently design consumer audio appliance. Enteknograte engineering team provides predictive simulation consultant and models to assess the vibro-acoustic performance of audio devices such as loudspeakers or headsets.

NVH ( Noise, Vibration, and Harshness ) simulation services

For an early design of NVH characteristics of components and entire machine and vehicle, simulation tools are essential. Enteknograte offers a wide variety of solutions to your questions concerning the simulation of sound and vibrations. Be it the analytical modeling of possible noise sources under consideration of their physical formation mechanisms or FE and MBD models for the simulation of sound and vibration transfer – we are prepared for all of your questions.

Finite Element Analysis of Durability and Fatigue Life

Vibration Fatigue, Creep, Welded Structures Fatigue, Elastomer and Composite Fatigue with Ansys Ncode, Simulia FE-Safe, MSC CAEFatigue, FEMFAT
Durability often dominates development agendas, and empirical evaluation is by its nature time-consuming and costly. Simulation provides a strategic approach to managing risk and cost by enabling design concepts or design changes to be studied before investment in physical evaluation. The industry-leading fatigue Simulation technology such as Simulia FE-SAFE, Ansys Ncode Design Life and FEMFAT used to calculate fatigue life of multiaxial, welds, short-fibre composite, vibration, crack growth, thermo-mechanical fatigue.

Vibration Fatigue Finite Element Simulation: Time & Frequency Domain

Structural vibration can be a source for many product related problems; it can cause fatigue and durability problems as well as adverse reactions to the user or bystanders in the form of undesirable vibrations that can be felt or heard. As well, undesired structural vibrations can prevent products from operating as required and potentially becoming a safety concern. The Vibration Fatigue simulation predict fatigue in the frequency domain and it is more realistic and efficient than time-domain analysis for many applications with random loading such as wind and wave loads.

Hydrodynamics & HydroAcoustics simulation for AIV (Acoustic Induced Vibration)

The pressure reduction process induces turbulent pressure fluctuations in the flowing medium, which in turn excites the downstream pipe wall, causing stresses and potentially fatigue failure. The intensity of vibration tends to increase with mass flow rate, velocity, and pressure loss. AIV (Acoustic Induced Vibration) failures are known to occur preferentially at non-axisymmetric discontinuities in the downstream piping, such as at small-bore branches and their welded supports.

Cavitation in Propulsion Systems

CFD Analysis of Propulsion Systems and Cavitation for Marine and Shipbuilding Industry
For water pumps, marine propellers, and other equipment involving hydrofoils, cavitation can cause problems such as vibration, increased hydrodynamic drag, pressure pulsation, noise, and erosion on solid surfaces. Most of these problems are related to the transient behavior of cavitation structures. To better understand these phenomena, unsteady 3D simulations Modeling Cavitation of cavitating flow around single hydrofoils are often performed and the results are compared to experiments.

Multibody Dynamics & NVH (Noise, vibration, and harshness)

Noise, vibration, and harshness (NVH) are critical factors in the performance of many mechanical designs but designing for optimum NVH can be difficult. While strength and durability limits are being pushed further and further, requirements for noise reduction are becoming more stringent. In addition, focus is increasingly being placed on transmission and powertrain noise because other sources could be reduced meanwhile.

Noise, Vibration & Harshness – NVH for Electric Motors

To optimize for NVH, our engineers use the forces from the EM analysis to perform advanced vibro-acoustic simulations. The forces are mapped to evaluate the structural dynamics response of the motor. Modal and harmonic stress coupling responses are important for simulating the NVH of an electric motor and for proper vibro-acoustic design of electric vehicles (EVs). The harmonic analyses generate absolute magnitudes of vibrations and waterfall diagrams to get a complete picture of the motor’s acoustic profile.

Hydrodynamics CFD simulation, Coupled with FEA for FSI Analysis of Marine and offshore structures

Transient Resistance, Propulsion, Sea-Keeping and Maneuvering Simulation, Cavitation, Vibration and Fatigue
Hydrodynamics is a common application of CFD and a main core of Enteknograte expertise for ship, boat, yacht, marine and offshore structures simulation based design. Coupling Hydrodynamic CFD Simulation in Ansys Fluent, Siemens Star-ccm+ and MSC Cradle with structural finite element solver such as Abaqus and Ansys, enable us to Simulate most complicated industrial problem such as Cavitation, Vibration and Fatigue induced by hydrodynamics fluctuation, Transient Resistance, Propulsion, Sea-Keeping and Maneuvering Simulation, considering two way FSI (Fluid Structure Interaction) coupling technology.

Integrated Artificial Intelligence (AI) & Machine Learning - Deep Learning with CFD & FEA Simulation

Machine learning is a method of data analysis that automates analytical model building. It is a branch of Artificial Intelligence based on the idea that systems can learn from data, identify patterns and make decisions with minimal human intervention. With Artificial Intelligence (AI) applications in CAE, that is Mechanical Engineering and FEA and CFD Simulations as design tools, our CAE engineers evaluate the possible changes (and limits) coming from Machine learning, whether Deep Learning (DL), or Support vector machine (SVM) or even Genetic algorithms to specify definitive influence in some optimization problems and the solution of complex systems.

Seat Design: Finite Element and CFD Simulation for Static & Dynamic Comfort, Whiplash, Acoustic & Thermal Comfort, Crash Test

Simulation Based Design can help us to ensure the right occupant posture, which is essential for safety, Static and Dynamic Comfort, for example by predicting the H-Point and incorporating whiplash, thermal and Acoustic comfort simulation. The ability to predict the comfort of innovative seat designs using simulation tools, a library of human models with our team experience in CFD (Siemens Start-ccm+, Ansys Fluent and OpenFoam) and FEA (Ansys LS-DYNA, Simulia Abaqus, ESI Pam-Crash and Altair RADIOSS) simulation software with integrated Artificial Intelligence and Machine Learning for innovative design, can help manufacturers to create seats that provide a superior driving experience for their customers.

1D/3D Coupled Simulation and Co-Simulation: Detailed Chemistry & Multiphase Flow Modeling with 1D Modeling

Enteknograte engineering team use advantage of CFD solver’s detailed chemistry, multiphase flow modeling, and other powerful features in coupling and co-simulation of CFD (Siemens Star-ccm+, AVL Fire, Ansys Fluent, Converge), 1D systems softwares (Matlab simulink, GT-Suite, Ricardo Wave allowing 1D/3D-coupled analyses to be performed effortlessly) and FEA software (Abaqus, Ansys, Nastran) for engine cylinder coupling, exhaust aftertreatment coupling, and fluid-structure interaction coupling simulation.

Aerodynamics Simulation: Coupling CFD with MBD, FEA and 1D-System Simulation

Aerodynamics studies can cover the full speed range of low speed, transonic, supersonic and hypersonic flows as well as turbulence and flow control. System properties such as mass flow rates and pressure drops and fluid dynamic forces such as lift, drag and pitching moment can be readily calculated in addition to the wake effects. This data can be used directly for design purposes or as in input to a detailed stress analysis. Aerodynamics CFD simulation with sophisticated tools such as MSC Cradle, Ansys Fluent and Siemens Star-ccm+ allows the steady-state and transient aerodynamics of heating ventilation & air conditioning (HVAC) systems, vehicles, aircraft, structures, wings and rotors to be computed with extremely high levels of accuracy.

eVTOL (Electric Vertical Take-Off and Landing) & UAM (Urban Air Mobility)

FEA & CFD Based Simulation for Airworthiness Certification, Aerodynamics, Aeroacoustics and Crashworthiness
The VTOL, eVTOL and UAM market is constantly changing and evolving, so maintaining a competitive edge both within the industry and supporting mission effectiveness requires significant research and development activities. Enteknograte offers the industry’s most complete simulation solution for Urban Air Mobility (UAM) and Vertical Take off and Landing (VTOL) aircrafts.

Full Vehicle MultiBody Dynamics Simulation: Car Ride, Driveline, Engine and Tire MBD

With MultiBody Dynamic Simulation, you can perform various analyses on the vehicle to test the design of the different subsystems and see how they influence the overall vehicle dynamics. This includes both on- and off-road vehicles such as cars, trucks, motorcycles, buses, and land machinery. Typical full vehicle analysis includes handling, ride, driveline, comfort, and NVH. Automotive models are also used for Realtime applications (HiL, SiL, and MiL). We can also examine the influence of component modifications, including changes in spring rates, damper rates, bushing rates, and anti-roll bar rates, on the vehicle dynamics.

Robots Dynamics & Performance Assessment: Coupled MBD & FEA Simulation-Based Design

Robot designers can increase the performance of their products by using Coupled FEA and MBD software such as Ansys, Abaqus, Simpack and MSC Adams multibody simulation (MBS) software to simulate the transient dynamic behavior of the complete robot mechanism and control algorithm.

Heat Transfer and Thermal Analysis: Fluid-Structure Interaction with Coupled CFD and Finite Element Based Simulation

We analyze system-level thermal management of vehicle component, including underhood, underbody and brake systems, and design for heat shields, electronics cooling, HVAC, hybrid systems and human thermal comfort. Our Finite Element (LS-Dyna, Ansys, Abaqus) and CFD simulation (Siemens Start-ccm+, Ansys Fluent , Ansys CFX and OpenFoam) for heat transfer analysis, thermal management, and virtual test process can save time and money in the design and development process, while also improving the thermal comfort and overall quality of the final product.

Aerodynamic Noise Simulation

Sound caused by pressure oscillation of fluid, such as wind noise, and sound caused by resonance can be predicted using Large Eddy Simulation (LES) and a weak compressible flow model. A Fast Fourier Transform calculation can be used within the CFD software to predict the frequency of noise. Predicting the noise generated by complex flows from steady CFD solutions allows us to study the noise generated by turbulent flows from CFD solutions.

Acoustics and Vibration: FEA and CFD for AeroAcoustics, VibroAcoustics and NVH Analysis

Noise and vibration analysis is becoming increasingly important in virtually every industry. The need to reduce noise and vibration can arise because of government legislation, new lightweight constructions, use of lower cost materials, fatigue failure or increased competitive pressure. With deep knowledge in FEA, CFD and Acoustic simulation, advanced Acoustic solvers and numerical methods used by Enteknograte engineers to solve acoustics, vibro-acoustics, and aero-acoustics problems in automotive manufacturers and suppliers, aerospace companies, shipbuilding industries and consumer product manufacturers.

Electromagnetic Multiphysics

FEA & CFD Based Simulation Including Thermal Stress, Fatigue, and Noise, Vibration & Harshness – NVH for Electric Motors
Enteknograte Finite Element Electromagnetic Field simulation solution which uses the highly accurate finite element solvers and methods such as Ansys Maxwell, Simulia Opera, Simulia CST, JMAG, Cedrat FLUX, Siemens MAGNET and COMSOL to solve static, frequency-domain, and time-varying electromagnetic and electric fields includes a wide range of solution types for a complete design flow for your electromagnetic and electromechanical devices in different industries.