Generation of uncertainty envelopes for thin acoustic screens with uncertain parameters
The properties of the materials used for building sound proofing systems are known to exhibit large variations. These may lead to significant differences in the acoustic responses within a given material batch, particularly when resistive screens are used as a surface component for a multi-layered a...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2020-01-01
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| Series: | Acta Acustica |
| Subjects: | |
| Online Access: | https://acta-acustica.edpsciences.org/articles/aacus/full_html/2020/03/aacus200007/aacus200007.html |
| _version_ | 1797712184236572672 |
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| author | Gaborit Mathieu Dazel Olivier Göransson Peter Jaouen Luc |
| author_facet | Gaborit Mathieu Dazel Olivier Göransson Peter Jaouen Luc |
| author_sort | Gaborit Mathieu |
| collection | DOAJ |
| description | The properties of the materials used for building sound proofing systems are known to exhibit large variations. These may lead to significant differences in the acoustic responses within a given material batch, particularly when resistive screens are used as a surface component for a multi-layered absorbing panel. In such thin films, it is mostly the thickness and the flow resistivity, but in some cases also the porosity, that are difficult to control in the production process. All these potential variations influence the acoustic response of the complete panel. In the present contribution, a method to isolate and evaluate the effect of uncertainties in a film is proposed. Using a transmission line approach, it is shown to be possible to predict the modification of the response induced by the uncertainties. The proposed technique is then adapted to determine uncertainty envelopes of the absorption coefficient, for experimentally acquired responses, that are closer to measured envelopes as compared to those generated using Monte Carlo simulations or simplified approaches. The method is tested both on numerical and experimental cases and shows, in both cases, a very good agreement with the reference solutions. Unlike Monte Carlo approaches, the proposed method does not require a massive computational effort which makes it suitable for real life applications. |
| first_indexed | 2024-03-12T07:18:02Z |
| format | Article |
| id | doaj.art-3d528d1c91034b75ad74b2a0e5b9b53e |
| institution | Directory Open Access Journal |
| issn | 2681-4617 |
| language | English |
| last_indexed | 2024-03-12T07:18:02Z |
| publishDate | 2020-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Acta Acustica |
| spelling | doaj.art-3d528d1c91034b75ad74b2a0e5b9b53e2023-09-02T22:39:09ZengEDP SciencesActa Acustica2681-46172020-01-0143810.1051/aacus/2020007aacus200007Generation of uncertainty envelopes for thin acoustic screens with uncertain parametersGaborit Mathieuhttps://orcid.org/0000-0001-9071-6325Dazel Olivier0https://orcid.org/0000-0002-0534-000XGöransson Peter1https://orcid.org/0000-0003-2393-4204Jaouen Luc2https://orcid.org/0000-0002-3141-800XLAUM UMR CNRS 6613, Le Mans UniversitéMWL, KTH Royal Institute of TechnologyMatelys Research LaboratoryThe properties of the materials used for building sound proofing systems are known to exhibit large variations. These may lead to significant differences in the acoustic responses within a given material batch, particularly when resistive screens are used as a surface component for a multi-layered absorbing panel. In such thin films, it is mostly the thickness and the flow resistivity, but in some cases also the porosity, that are difficult to control in the production process. All these potential variations influence the acoustic response of the complete panel. In the present contribution, a method to isolate and evaluate the effect of uncertainties in a film is proposed. Using a transmission line approach, it is shown to be possible to predict the modification of the response induced by the uncertainties. The proposed technique is then adapted to determine uncertainty envelopes of the absorption coefficient, for experimentally acquired responses, that are closer to measured envelopes as compared to those generated using Monte Carlo simulations or simplified approaches. The method is tested both on numerical and experimental cases and shows, in both cases, a very good agreement with the reference solutions. Unlike Monte Carlo approaches, the proposed method does not require a massive computational effort which makes it suitable for real life applications.https://acta-acustica.edpsciences.org/articles/aacus/full_html/2020/03/aacus200007/aacus200007.htmlacoustics screensuncertaintiesthin layersporoelastic media |
| spellingShingle | Gaborit Mathieu Dazel Olivier Göransson Peter Jaouen Luc Generation of uncertainty envelopes for thin acoustic screens with uncertain parameters Acta Acustica acoustics screens uncertainties thin layers poroelastic media |
| title | Generation of uncertainty envelopes for thin acoustic screens with uncertain parameters |
| title_full | Generation of uncertainty envelopes for thin acoustic screens with uncertain parameters |
| title_fullStr | Generation of uncertainty envelopes for thin acoustic screens with uncertain parameters |
| title_full_unstemmed | Generation of uncertainty envelopes for thin acoustic screens with uncertain parameters |
| title_short | Generation of uncertainty envelopes for thin acoustic screens with uncertain parameters |
| title_sort | generation of uncertainty envelopes for thin acoustic screens with uncertain parameters |
| topic | acoustics screens uncertainties thin layers poroelastic media |
| url | https://acta-acustica.edpsciences.org/articles/aacus/full_html/2020/03/aacus200007/aacus200007.html |
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