Cochlea-inspired tonotopic resonators
The cochlea has long been the subject of investigation in various research fields due to its intriguing spiral architecture and unique sensing characteristics. One of its most interesting features is tonotopy, the ability to sense acoustic waves at different spatial locations based on their frequenc...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127523001272 |
| _version_ | 1827974721717665792 |
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| author | Vinícius F. Dal Poggetto Federico Bosia David Urban Paolo H. Beoletto Jan Torgersen Nicola M. Pugno Antonio S. Gliozzi |
| author_facet | Vinícius F. Dal Poggetto Federico Bosia David Urban Paolo H. Beoletto Jan Torgersen Nicola M. Pugno Antonio S. Gliozzi |
| author_sort | Vinícius F. Dal Poggetto |
| collection | DOAJ |
| description | The cochlea has long been the subject of investigation in various research fields due to its intriguing spiral architecture and unique sensing characteristics. One of its most interesting features is tonotopy, the ability to sense acoustic waves at different spatial locations based on their frequency content. In this work, we propose a novel design for a tonotopic resonator, based on a cochlea-inspired spiral, which can discriminate the frequency content of elastic waves without the use of sub-wavelength resonators. The structure is the result of an optimization process to obtain a uniform distribution of displacement maxima along its centreline for frequencies spanning nearly two-decades, while maintaining a compact design. Numerical simulations are performed to demonstrate the concept and experimental measurements to validate it on a 3D printed structure. The resulting frequency-dependent distribution is also shown to be a viable means to discriminate signals with various frequency components. We also show that for appropriate parameter ranges, the tonotopic behaviour can be inverted, i.e., lower frequencies can be made to concentrate in narrower regions, as happens in the real cochlea. The harnessed tonotopic features can be used as a fundamental principle to design structures with applications in areas such as non-destructive testing and vibration attenuation. |
| first_indexed | 2024-04-09T19:58:55Z |
| format | Article |
| id | doaj.art-b6275e85839b4b1786c35b61e4fbd12d |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-09T19:58:55Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-b6275e85839b4b1786c35b61e4fbd12d2023-04-03T05:20:45ZengElsevierMaterials & Design0264-12752023-03-01227111712Cochlea-inspired tonotopic resonatorsVinícius F. Dal Poggetto0Federico Bosia1David Urban2Paolo H. Beoletto3Jan Torgersen4Nicola M. Pugno5Antonio S. Gliozzi6Laboratory for Bio-inspired, Bionic, Nano, Meta Materials & Mechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, 38123 Trento, ItalyDISAT, Politecnico di Torino, 10129 Torino, ItalyDepartment of Electronic Systems, Norwegian University of Science and Technology, NO-7491 Trondheim, NorwayDISAT, Politecnico di Torino, 10129 Torino, ItalyTechnical University of Munich, TUM School of Engineering and Design, Department of Materials Engineering, Chair of Materials Science, Boltzmannstr. 15, 85748 Garching, GermanyLaboratory for Bio-inspired, Bionic, Nano, Meta Materials & Mechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, 38123 Trento, Italy; School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, United KingdomDISAT, Politecnico di Torino, 10129 Torino, Italy; Corresponding author.The cochlea has long been the subject of investigation in various research fields due to its intriguing spiral architecture and unique sensing characteristics. One of its most interesting features is tonotopy, the ability to sense acoustic waves at different spatial locations based on their frequency content. In this work, we propose a novel design for a tonotopic resonator, based on a cochlea-inspired spiral, which can discriminate the frequency content of elastic waves without the use of sub-wavelength resonators. The structure is the result of an optimization process to obtain a uniform distribution of displacement maxima along its centreline for frequencies spanning nearly two-decades, while maintaining a compact design. Numerical simulations are performed to demonstrate the concept and experimental measurements to validate it on a 3D printed structure. The resulting frequency-dependent distribution is also shown to be a viable means to discriminate signals with various frequency components. We also show that for appropriate parameter ranges, the tonotopic behaviour can be inverted, i.e., lower frequencies can be made to concentrate in narrower regions, as happens in the real cochlea. The harnessed tonotopic features can be used as a fundamental principle to design structures with applications in areas such as non-destructive testing and vibration attenuation.http://www.sciencedirect.com/science/article/pii/S0264127523001272Bioinspired structuresElastic wavesCochleaTonotopyEigenmode analysis |
| spellingShingle | Vinícius F. Dal Poggetto Federico Bosia David Urban Paolo H. Beoletto Jan Torgersen Nicola M. Pugno Antonio S. Gliozzi Cochlea-inspired tonotopic resonators Materials & Design Bioinspired structures Elastic waves Cochlea Tonotopy Eigenmode analysis |
| title | Cochlea-inspired tonotopic resonators |
| title_full | Cochlea-inspired tonotopic resonators |
| title_fullStr | Cochlea-inspired tonotopic resonators |
| title_full_unstemmed | Cochlea-inspired tonotopic resonators |
| title_short | Cochlea-inspired tonotopic resonators |
| title_sort | cochlea inspired tonotopic resonators |
| topic | Bioinspired structures Elastic waves Cochlea Tonotopy Eigenmode analysis |
| url | http://www.sciencedirect.com/science/article/pii/S0264127523001272 |
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