Door and panel construction

Claim 1

IN A METAL SOUND ATTENUATING DOOR PANEL CONSTRUCTION IN COMBINATION, (A) VERTICALLY EXTENDING SPACED FRONT AND REAR SKIN PLATES HAVING THEIR ADJACENT VERTICAL EDGES CONNECTED TO PROVIDE AN OPEN ENDED HOLLOW METAL STRUCTURE, (B) VERTICALLY DISPOSED STIFFENING MEMBERS SPACED TRANSVERSELY BETWEEN THE VERTICAL MARGINAL EDGES OF SAID SKIN PLATES WITH EACH SAID STIFFENING MEMBER SECURED TO THE INNER FACES OF EACH OF SAID SKIN PLATES TO DEFINE BETWEEN THEM A VERTICALLY DISPOSED VENTILATING LOUVRE THROAT, (C) A MEMBER EXTENDING TRANSVERSELY OF SAID SKIN PLATES ADJACENT EACH HORIZONTAL EDGE OF SAID PANEL AND BETWEEN SAID VERTICALLY DISPOSED STIFFENING MEMBERS DEFINING THE VERTICAL MARGINS OF SAID VENTILATING LOUVRE THROAT, (D) AN OPENING THROUGH EACH SAID SKIN PLATE ADJACENT SAID TRANSVERSELY EXTENDING MEMBERS CONNECTING SAID LOUVRE THROAT WITH THE OPPOSITE FACES OF SAID DOOR PANEL, (E) PERFORATED PLATE MEMBERS IN SPACED RELATION TO SAID SKIN PLATES DEFINING OPPOSITE WALLS OF SAID LOUVRE THROAT BETWEEN SAID SKIN PLATE OPENINGS AND HAVING THEIR VERTICAL MARGINAL EDGES ATTACHED TO SAID VERTICAL STIFFENING MEMBERS, (F) LOUVRE MEMBERS CLOSING SAID SKIN PLATE LOUVRE OPENINGS, (G) A POROUS NON-CONTINUOUS SOUND ATTENUATING MATERIAL FILLING THE SPACES BETWEEN SAID SKIN PLATES AND STIFFENING MEMBERS AND BETWEEN SAID SKIN PLATES AND PERFORATED LOUVRE LINING PLATES AND, (H) CLOSURE MEMBERS DISPOSED BETWEEN AND SECURED TO SAID SKIN PLATES FOR ENCLOSING SAID POROUS MATERIAL AND DEFINING THE TOP AND BOTTOM HORIZONTAL EDGES OF SAID DOOR PANEL.