Novel, patent-pending, bone conducting audio technology
Here is a beautifully designed patent-pending headphone that utilizes bone and liquid conduction to allow for immersive listening.
It generates an omnidirectional surround effect and gives richness and vibrotactile feedback to the low-end enhancing a more immersive perception of sound. By bypassing the outer and middle ear, it is inclusive to people with hearing loss and cochlear implants. source
The headphone is filled with water and gel
And the prototype can be seen in the video below