Broadband compact absorbers and composite plate resonators - top-class high-performance sound absorbers

© Onix_Art / Shutterstock

Sound absorbers are our passion

For 90 years we have been working on innovative high-performance sound absorbers for special applications. Our experts in the Department of Acoustics have invented the broadband compact absorber (BCA) as well as composite plate resonators (CPR) and micro-perforated absorbers. All solutions have had a lasting impact on the sound absorber market - and made the acoustics of the best-sounding rooms in the world possible in the first place.

Fraunhofer IBP's technologies enable, for example, uniform absorption in the frequency range from 63 Hz to 8000 Hz by combining a plate transducer with a porous absorber (broadband compact absorber BCA), despite an extremely small overall depth of max. 25 cm.

In addition, with our composite plate resonator technology, we offer a highly-effective solution for absorbing low frequencies with an alpha value of ~ 1 in the frequency range from 63 Hz to 125 Hz, also despite an extremely small overall depth of max. 10 cm.

Fraunhofer IBP's micro-perforated absorbers, which are highly effective in the medium frequency range from 125 Hz to 1000 Hz and yet still transparent, are also the basis for translucent or transparent absorbers.

In cooperation with Fraunhofer IBP's Department of Life Cycle Engineering, we are pushing not only highly-effective sound absorbers, but also sustainable ones. During development and optimization, we consider the entire value creation process. In this way, we make sure that our technology is not only state-of-the-art in technical terms, but also in ecological, economic and social terms.


Sound absorbers have a wide range of applications

By combining all technologies, our solutions can be used for many different purposes, for example:

  • In room acoustics, to ensure compliance with requirement specifications, for example, according to DIN 18041, VDI 2569, ITU BS 1116, ASR A3.7, DIN 15996, etc.
  • In technical acoustics, to eliminate low-frequency disturbances and problems
  • In musical acoustics for opera houses, concert halls, rehearsal rooms, theaters, recording studios, film studios and cinemas
  • In offices / open-plan offices, to ensure collaboration and communication in equal measure, but also acoustic privacy and as few acoustic distractions as possible
  • In special acoustic test rooms, such as anechoic chambers, semi-anechoic chambers or vehicle test facilities
  • In highly specific applications, such as areas with hygiene requirements (kitchens, system catering), extreme thermal conditions (indoor swimming pools, spas), historical buildings and monuments or mechanical loads.

What can we do for you? Write us a mail!