Fig. 18

a Schematic illustration of the MXene-based intelligent artificial eardrum. b SEM image of the microcone arrays covered with MXene. c The change of the total resistance of the MXene eardrum under the action of external sound signals. d Comparison of resistance responses of MXene and graphene under the same sound pressure level. e Sensitivity of the MXene-based intelligent artificial eardrum. f Different speech signals recorded by the MXene eardrum. g Flowchart of machine learning. h Visualization results after dimensionality reduction of speech information. i Inconsistency results between the prediction dataset and the test dataset for speech information [227]. Copyright 2022, American Association for the Advancement of Science