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Abstract
In this paper FEM models of several acoustic soundboard were produced. Initially a simplified case of a rectangular plate similar to a distributed mode loudspeaker was simulated, followed by an acoustic guitar soundboard with fixed constraints at the edges. A process of model fitting was performed, in the attempt to match the orthotropic behaviour of the material used for the membranes, namely red cedar.
Thanks to this step-by-step approach, both the Eigen-modes analysis and the forced response were computed in order to predict the overall frequency spectrum of the acoustic guitar soundboard. Eventually, an informative comparison between simulated data and measurements was obtained.
Results indicate that FEM modelling and a measurement system could become vital manufacturing tools to optimise the workflow in the luthier shop when a specifically tailored response needs achieving. Data also shows that even a simplified FEM model exploiting wood’s specific anisotropic properties can be accurate and helpful when designing new bracing patterns or analysing specific instrument’s resonances.
Future research will expand the presented FEM simulations to include the guitar’s body with its Helmholtz resonator, and the mutual coupling of the sides and the backplate. This will increase the accuracy of the available predictions and will possibly capture more similarities between acoustic instruments and loudspeaker enclosures.
Thanks to this step-by-step approach, both the Eigen-modes analysis and the forced response were computed in order to predict the overall frequency spectrum of the acoustic guitar soundboard. Eventually, an informative comparison between simulated data and measurements was obtained.
Results indicate that FEM modelling and a measurement system could become vital manufacturing tools to optimise the workflow in the luthier shop when a specifically tailored response needs achieving. Data also shows that even a simplified FEM model exploiting wood’s specific anisotropic properties can be accurate and helpful when designing new bracing patterns or analysing specific instrument’s resonances.
Future research will expand the presented FEM simulations to include the guitar’s body with its Helmholtz resonator, and the mutual coupling of the sides and the backplate. This will increase the accuracy of the available predictions and will possibly capture more similarities between acoustic instruments and loudspeaker enclosures.
Original language | English |
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Title of host publication | Reproduced Sound 2021 |
Subtitle of host publication | Institute of Acoustics Proceedings |
Publisher | Institute of Acoustics |
Number of pages | 11 |
ISBN (Print) | 9781906913403 |
DOIs | |
Publication status | Published - 30 Nov 2021 |
Event | Reproduced Sound 2021: You’re on Mute – The importance of Audio - Bridtol, Bristol, United Kingdom Duration: 16 Nov 2021 → 18 Nov 2021 https://reproducedsound.co.uk/ |
Publication series
Name | Institute of Acoustics Proceedings |
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Publisher | Institute of Acoustics |
Number | 2 |
Volume | 43 |
Conference
Conference | Reproduced Sound 2021 |
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Abbreviated title | RS2021 |
Country/Territory | United Kingdom |
City | Bristol |
Period | 16/11/21 → 18/11/21 |
Internet address |
Keywords
- FEM
- guitar manufacturing
- acoustic measurements
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Acoustic instruments measurements and innovative manufacturing
Ausiello, L. (PI), Sanders, D. (Team Member), Becerra, V. (Team Member) & Squicciarini, G. (CoI)
1/03/18 → …
Project: Research