Sound insulation panel and sound insulation structure comprising the same

A sound insulation panel comprising:

• a patterned plate comprising an edge plate and a separation plate extending into an inner region of the edge plate and dividing the inner region into a first elastic region and a second elastic region, and a central plate formed at the center of the inner region through intersection between multiple sections of the separation plate;
• an elastic plate protruding from the patterned plate to be stepped with respect to the patterned plate and comprising a first elastic plate disposed in the first elastic region and a second elastic plate disposed in the second elastic region, the elastic plate blocking an air flow path and converting airborne sound waves into elastic waves;
• a protruding pattern portion protruding from the central plate and being corrugated to be variable in height,
• wherein the first elastic plate and the second elastic plate are displaced in opposite directions at a resonant frequency of the sound insulation panel,
• wherein the first elastic region and the second elastic region are formed in pairs symmetric with respect to imaginary perpendicular lines or diagonal lines passing through the center of the inner region.