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What constitutes good sound? How can speech intelligibility in a vehicle be evaluated and improved? Fraunhofer IDMT in Oldenburg offers car manufacturers and suppliers improved speech intelligibility and sound comfort, taking individual preferences and needs into consideration. Depending on the application, individual and better hearing is defined on the basis of various sound parameters.

In the car, background noise often drowns out speech from the navigation system, telephone or radio. Our software solutions are able to automatically measure and display intelligibility and optimise it in real time.

For music or audio books, users can adjust individually perceived sound quality with the help of the »YourSound« feature and thus improve comfort without taking unnecessary safety risks. This is because the user interface is intuitive and easy to operate; the Fraunhofer algorithms automatically adapt to the situation and improve the listening experience.


  • Development and testing of algorithms to improve speech quality and intelligibility for telephone systems and entertainment
  • Automatic adjustment of speech intelligibility to driving situations and ambient noise during media playback
  • Individual sound adjustment to driving situations, ambient noise and the user’s listening preferences
  • Fewer operating errors thanks to intuitive user interfaces
  • Speech and speaker recognition and voice control inside and outside the vehicle
  • Intelligent signal processing algorithms embedded in different systems and mobile applications (apps)


Project Examples

»YourSound« (Fraunhofer IDMT in Oldenburg)

Hearing Perception and Sound Quality (Fraunhofer IDMT in Oldenburg)

Speech Recognition for Products and Processes (Fraunhofer IDMT in Oldenburg)

Individual sound quality and good speech intelligibility (Fraunhofer IDMT in Oldenburg)