Realization of hyper acoustic transmission through a subwavelength hole using membrane

We present the first experimental realization of extraordinary acoustic transmission through a subwavelength hole using membrane resonator which has high quality factor. Our transmission efficiency normalized to the aperture area is 57times larger than the impinging at a hole opening, which is strongly enhanced result than previous studies. The key role played by membrane resonance in transferring sound efficiently from the input to the output region is presented. This knowledge is opening up exciting new opportunities in applications ranging from subwavelength acoustics to chemical sensing and biophysics.