Investigating vibroacoustic sound emission of a clinically applied knee prosthesis

Andreas Wurzinger, Bernhard Mayr-Mittermüller, Harald Sima, Manfred Kaltenbacher, Stefan Schoder

Research output: Chapter in Book/Report/Conference proceedingConference paper


Identification and evaluation of sound generation of a knee prosthesis is a major part of the development of next-generation prostheses, as its noise emissions have multiple negative effects on both the user and the user’s environment. This work focuses on the vibroacoustics of a clinically applied hydraulic knee prosthesis.
Structural vibrations are induced by turbulent flow phenomena inside the encapsulated, passive hydraulic damping unit of the prosthesis under investigation. Therefore, the frame of the prosthesis is investigated both experimentally and numerically, to better understand significant vibroacoustic emission mechanisms.
Laser-Doppler vibrometry was used to obtain a modal representation of the structural dynamics of the prosthesis frame for a reproducible excitation source. Furthermore, the acoustic near- and far-field based on the experimentally obtained structural vibrations is predicted using the boundary element solver NiHu.
Consequently, the presented methods cover a major part of the overall acoustic transfer path of sound in a complex encapsulated hydraulic system and provide a link to investigations on the flow acoustics inside the hydraulic system.
Original languageEnglish
Title of host publicationFortschritte der Aktustik - DAGA 2023
Subtitle of host publication49. Jahrestagung für Akustik, 06.-09. März 2023 in Hamburg
Place of PublicationBerlin
PublisherDeutsche Gesellschaft für Akustik e.V.
ISBN (Electronic)978-3-939296-21-8
Publication statusPublished - 2023
EventDAGA 2023 - 49. Jahrestagung für Akustik - Hamburg, Germany
Duration: 6 Mar 20239 Mar 2023


ConferenceDAGA 2023 - 49. Jahrestagung für Akustik
Abbreviated titleDAGA 2023


  • Acoustics
  • Vibroacoustics


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