Soundproofing panel and method of producing said panel

US6085865A · kind A · utility

Assignees

• Societe Nationale d'Etude et de Construction de Moteurs d'Aviation - S.N.E.C.M.A · FR
• ATECA · FR
• Hispano Suiza Aerostructures · FR

Inventors

• Osmin Delverdier · Toulouse, FR
• Patrick Gonidec · Colomiers, FR
• Jacques Michel Albert Julliard · Voiron, FR
• Bernard Louis Le Barazer · Le Havre, FR
• Eric Lecossais · Virville, FR
• Georges Jean Xavier Riou · Moissy-Cramayel, FR
• Philippe Vie · Toulouse, FR

Key dates

• Filing date: Feb 25, 1999
• Grant date: Jul 11, 2000
• Expiry date: Feb 25, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24149
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

A soundproofing panel comprises a honeycomb core sandwiched between a solid skin and a porous skin, the cells of the honeycomb being divided in the direction of its thickness into at least two resonant cavities by a least one partition which is traversed by passages interlinking the cavities. The partitions are formed by a plurality of hollow microbeads having porous walls, the microbeads being bonded to one another and to the walls of the honeycomb at their points of contact. Such a soundproofing panel combines high performance in terms of linearity as a function of the level of sound excitation, attenuation band, bulk and mechanical strength.