There is nothing more than a slight whirring sound to be heard when an electric vehicle starts moving. Many sources of noise only come to the fore when the engine noise has almost ceased. Suddenly the air conditioning can be clearly heard, and electrically powered comfort functions emit noises that you never heard before. All of this can perhaps be "drowned out" or avoided entirely with acoustic testing technology. RTE offers its customers clear planning approaches for the development and integration of highly automated test systems, concepts for real-time monitoring and testing or the implementation of smart testing techniques with AI algorithms.

  • Electrical Comfort Components
  • Shading, air conditioning, locking systems, mirrors, seat adjusters ...
  • Drive technology
  • Powertrain, transmission, brakes, steering, pumps ...
  • Energy systems and energy storage
  • Batteries, compressors, pumps, charging modules ...
  • Electrical control modules
  • of electric, combustion and hybrid engines
Acoustic testing technology can generate permanent added value for your company and reducing costs. Let's set off together.

Acoustic testing with a laser vibrometer?

Body-borne noise measurement with the IVS-500 Polytec laser vibrometer

Monitoring of quality characteristics in components and brake systems

An optimist sees the opportunity in every difficulty.
A pessimist sees the difficulty in every opportunity.

Jörg Ritter, Managing Director
RTE Akustik + Prüftechnik GmbH


Serial monitoring – Inline natural frequency measurement for brake discs

The trend of using natural frequency measurement to monitor brake discs and components has prompted RTE to develop novel solutions as the standard for universal industrial application. This novel…

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Noise and functional testing

In today’s manufacturing world, product quality assurance and noise monitoring of components are key elements of the manufacturing strategy. Test results must be documented and traceable. The re-evaluation of measurement data is the basis for continuous process…

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Since its foundation, RTE has been developing and supplying acoustic testing solutions for industrial quality assurance.

Backed by years of experience, RTE offers comprehensive consulting services to find the best acoustic testing approach and develop customised solutions for all your testing requirements. From feasibility analysis and product sampling through the…

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RTE business dialogue

This video gives you an overview of the acoustic test technology and its future application.


An interruption to production and supply caused by breakdowns and defects in quality at the customer’s site requires immediate troubleshooting and implementation of quality assurance measures. Visual inspection alone cannot determine whether metallic components are free of cracks or structural defects. Expensive and costly CT scans give a good indication, but they are only practical for laboratory and error analysis applications. For serial monitoring, fast and efficient testing systems are required. This is where acoustic material testing offers the best possible solutions.

The present request for help was addressed with a fast and uncomplicated quality monitoring solution, thereby securing supply capabilities. One of the challenges of using acoustic material testing was the absence of defective reference parts to calibrate the system to detect defects. It was decided to initially parameterise the inspection system only for non-defective parts, in order to identify parts showing anomalous responses compared to those parts which had passed quality inspection (non-defective parts). Suspect parts were then thoroughly examined using metallurgical and CT methods. Defects were confirmed on parts exhibiting acoustical anomalies, allowing the corresponding test parameters to be configured. This validated the use of the acoustic testing technology. Reliable supply capacity and the requisite quality control were restored through the excellent teamwork of all parties involved.