Journal of Advanced Dielectrics, Volume. 13, Issue 4, 2341008(2023)

Resonance phenomena in dielectric media: A review and comparison of acoustic and electromagnetic modes

Gunnar Gidion*, Taimur Aftab, Leonhard M. Reindl, and Stefan J. Rupitsch
Author Affiliations
  • Department of Microsystems Engineering, University of Freiburg, Georges-Köhler-Allee 106, 79110 Freiburg im Breisgau, Germany
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    The theory and application of resonances and vibrational modes are part of the foundation of science. In this contribution, examples of acoustical resonators are highlighted, and compared to electromagnetic modes. As an example from architecture, we describe the phenomenon of whispering galleries; such modes are nowadays known in dielectric and optical resonators. A specimen of a semicircular whispering bench in Park Sanssouci in Potsdam is acoustically investigated and demonstrated to show low losses for sound propagation. A special acoustical bug is discussed which was used for the espionage of the U.S. ambassador in Moscow. The Sovyets could interrogate this passive device by radio waves. Its working principle was based on the electromagnetic resonance of the cavity that the sound-sensitive membrane was part of. The underlying relation between excitation and resonance is compared to the sound production in flue organ pipes. A stopped flue organ pipe was investigated using a piezoelectric film sensor inside the pipe body. The results show that even-numbered modes, which are usually suppressed in the radiated sound of a stopped pipe, are still present in the vibrations inside the resonator.


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    Gunnar Gidion, Taimur Aftab, Leonhard M. Reindl, Stefan J. Rupitsch. Resonance phenomena in dielectric media: A review and comparison of acoustic and electromagnetic modes[J]. Journal of Advanced Dielectrics, 2023, 13(4): 2341008

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    Paper Information

    Category: Research Articles

    Received: Sep. 4, 2022

    Accepted: Apr. 9, 2023

    Published Online: Oct. 11, 2023

    The Author Email: Gidion Gunnar (