E-mobility: the challenge for quality assurance!

Due to the almost silent electric vehicles, the noises from auxiliary units are becoming more and more of a problem, as they are not drowned out by any "pleasant" noise such as the full sound of an internal combustion engine. Quality assurance and noise monitoring for auxiliary units, adjusters and pumps are therefore becoming increasingly important. Targeted testing technology supports you in the development and production of all necessary electrical components in e-mobility.

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.