Acoustical structure

Claim 1

AN ACOUSTICAL PANEL COMPRISING A CASING AND SOUND DEADENING MEANS WITHIN SAID CASING, SAID CASING INCLUDING FIRST AND SECOND COVER MEMBERS, SAID FIRST COVER MEMBER COMPRISING A SUBSTANTIALLY FLAT FIRST SHEET, SAID SECOND COVER MEMBER COMPRISING A SUBSTANTIALLY FLAT SECOND SHEET IN SPACED PARALLEL RELATION TO AND COEXTENSIVE WITH THE FIRST SHEET, SAID SOUND DEADENING MEANS INCLUDING A RELATIVELY RIGID HONEYCOMB CORE FORMING A LAYER BETWEEN AND SUBSTANTIALLY COEXTENSIVE WITH SAID SHEETS, THE OPPOSITE SURFACES OF SAID HONEYCOMB CORE BEING SDHERED DIRECTLY TO THE OPPOSED SURFACES OF SAID SHEETS TO PREVENT SAID SHEETS FROM SAGGING OR SEPARATING FROM SAID HONEYCOMB CORE, SOUND DEADENING MATERIAL IN THE CELLS OF SAID HONEYCOMB CORE, SAID SECOND COVER MEMBER HAVING EXTENSIONS PROJECTING LATERALLY OUTWARDLY BEYOND OPPOSITE SIDES OF SAID SECOND SHEET, SAID FIRST COVER MEMMER HAVING EXTENSIONS PROJECTING LATERALLY OUTWARDLY BEYOND OPPOSITE SIDES OF SAID FIRST SHEET ALONGSIDE THE EXTENSIONS OF SAID SECOND COVER MEMNER, THE EXTENSIONS OF SAID COVER MEMBERS BEING RIGIDLY SECURED TOGETHER TO PREVENT SEPARATION OF SAID MEMBERS AND TO PREVENT DELAMINATION OF SAID MEMBERS AND SAID CORE.