Reverse engineering techniques for investigating the vibro-acoustics of historical bells

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

Abstract

In this paper, we present an effective methodology for assessing the vibrational properties of real-life bells, using reverse engineering techniques. When struck by a clapper, bells vibrate in rather complicated ways, which result in complex sounds. Typically, to obtain pleasant sounds, bell founders tune the first five partials (vibration modes) according to specific frequency ratios, while also trying to control the amount of beats, which also affect the musical quality. In practice, many musically important aspects are strongly related to fine details of the bell geometry. In this work, we use scanning imaging technology to obtain precise 3D geometry bell data, and then assess the bell tuning features by combining the acquired 3D geometrical data with Finite Element modal computations. Our numerical results are compared with experimentally identified bell modes, attesting the feasibility and effectiveness of the proposed approach. This analysis strategy is particularly suited in the context of cultural heritage preservation, by providing new and comprehensive ways to characterize and describe historical bells. Moreover, it can also shed light when addressing bell casting and tuning techniques throughout times.

Original languageEnglish
Title of host publicationAdvances in Acoustics and Vibration
Subtitle of host publicationProceedings of the Second International Conference on Acoustics and Vibration (ICAV2018), March 19-21, 2018, Hammamet, Tunisia
EditorsT. Fakhfakh, C. Karra, S. Bouaziz, F. Chaari, M. Haddar
Place of PublicationBerlim
PublisherSpringer
Pages218-226
Number of pages9
Volume2
ISBN (Print)978-3-319-94616-0
DOIs
Publication statusPublished - 2019
EventSecond International Conference on Acoustics and Vibration - Hammamet, Tunisia
Duration: 19 Mar 201821 Mar 2018

Publication series

NameApplied Condition Monitoring
Volume13
ISSN (Electronic)2363-6998

Conference

ConferenceSecond International Conference on Acoustics and Vibration
CountryTunisia
CityHammamet
Period19/03/1821/03/18

Keywords

  • 3D scanning
  • Bells
  • Modal analysis
  • Reverse engineering
  • Vibro-acoustics

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  • Cite this

    Debut, V., Carvalho, M., Soares, F., & Antunes, J. (2019). Reverse engineering techniques for investigating the vibro-acoustics of historical bells. In T. Fakhfakh, C. Karra, S. Bouaziz, F. Chaari, & M. Haddar (Eds.), Advances in Acoustics and Vibration: Proceedings of the Second International Conference on Acoustics and Vibration (ICAV2018), March 19-21, 2018, Hammamet, Tunisia (Vol. 2, pp. 218-226). (Applied Condition Monitoring; Vol. 13). Springer. https://doi.org/10.1007/978-3-319-94616-0_22