Sound insulation window with fully integrated innovative lowcost loudspeakers

Summary of the technology

The Fraunhofer LBF has developed loudspeakers made of electro-active polymers (EAP) and integrated them into a conventional double glazed window to reduce noise transmission from outside, especially in the frequency range where traditional windows have a lack of performance. The electro-active polymer allows the design of loudspeakers with quite flexible shapes, low weight compared to electrodynamic systems and a broader frequency range than e.g. piezoceramic based solutions. The concept is lighter than a laminated double glazed window with similar performance coefficients and outperforms conventional double glazed windows of the same mass.

Its field of application covers private households, facades of high rise buildings and special noise insulation applications, such as recording studios. Especially for high traffic areas, like settlements near airports or closeby train lines, the active window with EAP-loudspeakers offers a valuable solution.






About Fraunhofer Institute for Structural Durability and System Reliability LBF

Fraunhofer LBF in Darmstadt is one of the most traditional institutes of the Fraunhofer-Gesellschaft. Over 75 years ago, the former “Laboratory for Structural Durability LBF” shaped a completely new area of research that even back then was already economically significant and, up to today, has lost none of its topicality and pertinence. Particularly in the last decade, the institute developed its competence center both in breadth and depth on the basis of experimental structural durability with a great deal of innovation force and high degree of dynamics. Additional market segments beyond the traditional vehicle and mechanical engineering branches of industry were opened up.

More than 550 scientists, engineers, technicians, administrators and experts from diverse disciplines bring their know-how into interdisciplinary project work and services that extends beyond the boundaries of each subject matter to the advantage of customers and partners. They take up future-oriented topics, develop them to product and process innovations in close cooperation with their customers and thus set new trends.

The Fraunhofer LBF teams offer services along the entire valueadded chain starting with the material and its processing up to the finished component, the complex system, its qualification with regard to safety and reliability, and performance from product design to verification. Particularly in the area of plastics, the institute provides support at an early stage of the value added chain with polymer synthesis and in-depth material

Comprehensive material and energy-efficient solutions are developed in the areas of vibration technology, lightweight construction, reliability and polymer technology – tailored to the individual needs of each customer. Fraunhofer LBF reaches a number of different markets with its characteristic, wide-reaching competence and service portfolio, particularly in rail transport technology, ship building, aviation, mechanical and plant engineering, energy technology, building industry, medical technology and the chemical industry.

Fraunhofer Institute for Structural Durability and System Reliability LBF

Never miss an update from Fraunhofer Institute for Structural Durability and System Reliability LBF

Create your free account to connect with Fraunhofer Institute for Structural Durability and System Reliability LBF and thousands of other innovative organizations and professionals worldwide

Fraunhofer Institute for Structural Durability and System Reliability LBF

Send a request for information
to Fraunhofer Institute for Structural Durability and System Reliability LBF

About Technology Offers

Technology Offers on Technische Universität Darmstadt are directly posted
and managed by its members as well as evaluation of requests for information. Technische Universität Darmstadt is the trusted open innovation and science network aimed at directly connect industry needs with professionals online.


Need help requesting additional information or have questions regarding this Technology Offer?
Contact Technische Universität Darmstadt support

Already have an account? Log in

Sign up to keep reading and connect with platform members

Create an account