Hearing can distinguish directions, while vision can focus on a point for observation. If the auditory functions of focal length and focus are transferred to hearing, giving hearing the function of focusing at near and far distances, a breakthrough in sensory experience can be achieved.

聽覺能辨別方位，而視覺可以聚焦到某一點進行觀察，若將焦段、焦點這一聽覺功能通感到聽覺上，使聽覺也具備遠近聚焦的功能，實現一種感官體驗上的突破。