The automotive industry constantly improves all parts of the vehicle including engine, interior, outside parts and the outline of the car. To support this process gfai tech offers a wide range of equipment to measure and analyse all noise and vibration.

The Acoustic Camera can be used for various purposes in automotive applications. In R&D, for example, the system is involved in optimizing engine noise, improvement of cabin noise, localizing wind noise or decreasing emission of car parts. Another application is the end-of-line test or quality assurance of the finished vehicle.

Localization of Sound Sources at the Car

Measurements on a Car Engine

The image shows an under-hood measurement of a car. Combustion engines consist of many different parts which emit noise. The Acoustic Camera helps to precisely find out which part emits what type of sound within a few minutes. This way, engineers can quickly identify parts which need to be improved.

3D Sound Source Localization Inside a Car

The driver’s and passengers' comfort in the car is one of the highest-value targets during the acoustic optimization process. In electrical vehicles, the overall sound level inside the car is much lower as the engine sound is minor. This results in new challenges because all other sound sources become much more prominent. Using the Acoustic Camera with a sphere array, the complete sound emissions inside the car can be mapped onto the 3D model of the interior. This way, unwanted sound sources can easily be identified while driving or on a test-bench.

Wind Tunnel Measurements

Depending on the driving speed, the wind noise can become the most prominent noise source inside the car. Wind tunnels offer the perfect test conditions to examine the aerodynamic outline of each vehicle type. gfai tech provides customized solutions for highest precise sound source localization in wind tunnels including shear layer correction, 3D model generation and fitting, correlation analysis and many other features to find the best results.

2016 - On 3D-Beamforming in the wind tunnel - BeBeC - Dirk Döbler, Dr. Christof Puhle, GFaI; Jörg Ocker
2014 - Correlation of parallel car interior and exterior beamforming measurements in a wind tunnel - inter.noise - Stefan Neugebauer, Reinhard Rösel, Dirk Döbler

For more information and downloads have a look at the publications.

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DynaBeam - Measurement of a car engine and dashboard

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3D sound source localization inside a car

Modal Analysis when Developing Cars

Modal analysis plays a key role in vehicle design. The software WaveImage features all common methods of vibration analysis – Experimental Modal Analysis (EMA), Operational Modal Analysis (OMA), Finite Element Analysis (FEA), Operating Deflection Shapes (ODS), order tracking and order analysis and many other options. When analizing parts, the automatic modal hammer WaveHitMAX  is the perfect solution for highly precise single hit excitation.

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Experimental Modal Analysis of a Car Rim