Fig. 2From: Design of Bionic Cochlear Basilar Membrane Acoustic Sensor for Frequency Selectivity Based on Film Triboelectric NanogeneratorStructural design of the bionic membrane sensor. a The 3D view of the major components of the device for frequency selectivity. They are glued together, and only the stretchy PTFE membranes surrounded by the trapezoidal slit can vibrate freely under the sound stimulation. b The top view of the sensor. The electrodes, made of silver deposition, are numbered from electrode #1 to #9Back to article page