Patent ID: 7912227

Claim:
A sound reproducing screen comprising: at least one cell having a predetermined volume and comprising an oscillation member which reflects a sound signal when an ultrasonic wave, which is carried with the sound signal, is incident on the cell; and a screen having a matrix structure in which cells are continuously distributed, wherein the cell includes: a flat and thin elastic member having an elastic property, wherein the elastic member reflects the sound signal while oscillating in response to the ultrasonic wave when the ultrasonic wave is incident; and a hard net which is spaced from the elastic member by a predetermined interval, wherein the hard net comprises continuous holes of a network structure, and wherein the hard net is disposed in parallel with the elastic member so as to limit a displacement of one side of the oscillation of the elastic member wherein the elastic member comprise a thin film, wherein the mechanical impedance of the thin film is substantially equal to an impedance of air, wherein the mechanical impedance of the thin film is equal to a thickness of the thin film multiplied by a density of the thin film multiplied by an angular velocity of the ultrasonic wave.