Fig. 1. Ear analysis diagrams of Omiya brown fly. (a) Anatomical diagram; (b) equivalent mechanical model; (c) two vibration modes under the mechanical model

Fig. 2. Schematic diagram of biomimetic membrane structure

Fig. 3. Relationship diagrams of influence of rotating beam on modal frequency. (a) Width influence; (b) length influence

Fig. 4. Simulation diagrams.(a) Swing mode; (b) bending mode

Fig. 5. Physical picture of membrane

Fig. 6. Analysis diagrams of biomimetic membrane testing. (a) Schematic diagram of membrane; (b) experimental photos of membrane testing; (c) diaphragm frequency response curves; (d) directional response curve of membrane

Fig. 7. Sensor frequency response simulation diagrams.(a) Sensor simulation model; (b) simulation curve of sensor frequency response

Fig. 8. Simulation curves of directional response of sensors. (a) x-y plane; (b) x-z plane

Fig. 9. Sensor preparation diagrams. (a) Schematic diagram of sensor structure; (b) sensor packaging experiment; (c) physicalimage of sensor

Fig. 10. Spectral diagram of the sensor after packaging is completed

Fig. 11. Sensor performance testing experiments. (a) Experimental schematic diagram; (b) experimental physical image

Fig. 12. Sensor frequency response test curve

Fig. 13. Minimum detectable sound pressure result diagrams of the sensor. (a) Left; (b) right

Fig. 14. Sensor directivity test curves

Fig. 15. Sensor response curves as a function of sound source azimuth angle. (a) Left; (b) right