How Hair Cells in Cochlea Analyze Sound Waves New Hypothesis Based on Extraordinary Transmission in Acoustic Metamaterials

This paper discusses hearing system of human from engineering point of view, and reports four questions we have now; 1) why eardrum is so sensitive and broadband, 2) how middle ear compensates significant impedance mismatching, 3) how sounds are detected by such a small cochlea, and 4) how the sounds are absorbed perfectly without ringing. Discussion is focused on question 3), and new hypothesis based on extraordinary transmission in acoustic metamaterials is proposed.