Holey plate and composite panel for sound absorption and sound insulation using the same

A composite panel for sound absorption and sound insulation comprising:

• a holey plate comprising a base part, first bent parts configured to be bent from designated regions of the base part and to extend to be inclined so as to form a plurality of first punched holes by punching the designated regions of the base part in a thickness direction, and second bent parts configured to be bent from the first bent parts and to extend to be inclined so as to form second punched holes extending from the first punched holes, an angle of the second bent parts with the base part being smaller than an angle of the first bent parts with the base part;
• and
• a sound absorbing material configured to be bonded to a surface of the holey plate in a direction in which the first bent parts and the second bent parts are bent, among both surfaces of the holey plate, so as to absorb and insulate noise.