https://www.db-thueringen.de/receive/dbt_mods_00062505https://www.db-thueringen.de/servlets/MCRFileNodeServlet/dbt_derivate_00064809/2520-1131_6_2023_370-380.pdfhttps://www.db-thueringen.de/rsc/thumbnail/dbt_mods_00062505.png text article Neuromorphic acoustic sensing using an adaptive microelectromechanical cochlea with integrated feedback Lenk, Claudia aut Author 1136340254 0000-0002-3040-1265 Lenk Claudia Hövel, Philipp aut Author Hövel Philipp Ved, Kalpan aut Author 0009-0002-7731-0421 Ved Kalpan Durstewitz, Steve aut Author Durstewitz Steve Meurer, Thomas aut Author Meurer Thomas Fritsch, Tobias aut Author Fritsch Tobias article Männchen, Andreas aut Author Männchen Andreas Küller, Jan aut Author Küller Jan Beer, Daniel aut Author Beer Daniel Ivanov, Tzvetan aut Author 129297232 0009-0005-2461-0270 Ivanov Tzvetan Ziegler, Martin aut Author 1019038101 Ziegler Martin 2023-05-04 2024-09-13 11 Seiten en 621.3 10.1038/s41928-023-00957-5 http://uri.gbv.de/document/gvk:ppn:1843733838 his Host institution Fachgebiet Mikro- und nanoelektronische Systeme <Ilmenau> Many speech processing systems struggle in conditions with low signal-to-noise ratios and in changing acoustic environments. Adaptation at the transduction level with integrated signal processing could help to address this; in human hearing, transduction and signal processing are integrated and can be adaptively tuned for noisy conditions. Here we report a microelectromechanical cochlea as a bio-inspired acoustic sensor with integrated signal processing functionality. Real-time feedback is used to tune the sensing and processing properties, and dynamic switching between linear and nonlinear characteristics improves the detection of signals in noisy conditions, increases the sensor dynamic range and enables adaptation to changing acoustic environments. The transition to nonlinear behaviour is attributed to a Hopf bifurcation and we experimentally validate its dependence on sensor and feedback parameters. We also show that output-signal coupling between two coupled sensors can increase the frequency coverage. 6 5 370 380 text continuingjournal Nature electronics journal London Springer Nature Limited 2018 en 621.3 his Host institution 2024-09-13 2520-1131 2917571-9 http://uri.gbv.de/document/gvk:ppn:1011431416 dbt_mods_00062505