To provide a compound sound absorbing structure improving sound absorbing performance by compounding a surface layer and a main material layer, and by combining them with nonwoven fabric in which a porous sound absorbing material is used as a base, and also to provide a storage structure using the same.
The compound sound absorbing structure 10 is constituted by combining a base structure 1 obtained by compounding the surface layer 3 in which two nonwoven fabrics A and B being cloth materials such as span bond are used and the main material 2 which is composed of a polyester fabric or is mainly composed of the polyester fabric, with the nonwoven fabric 4 on which fire proofing/water proofing treatment is applied, a mesh structure 5 of a metallic system such as a metal mesh, and a punching metal 6 as a protective cover. By controlling flow resistance on the surface layer 3, it is effective for sound absorbing performance to adjust the flow resistance of the base structure 1 to be (2.0 to 5)104 (N sec)/m4, and it is lightweight with a thickness of 40 to 50 mm, and it is also used as an all-weather type. The stable sound absorbing performance is provided from a low/middle frequency band to a high frequency band, especially around 400 Hz.
| WO/2002/032763 | SOUND-PROOFING PANEL, IN PARTICULAR A ROTORCRAFT STRUCTURAL OR LINING PANEL |
| JPS60121011 | [Title of the device] Corner panel |
| JP2019143478 | NOISE SUPPRESSOR |
TAKANO YASUSHI
MUTO DAISUKE
WATANABE MAKOTO
CHOYA TAKAHIRO
IIDA KAZUYOSHI
TAMATA SEIJI
IKEDA KOJI
WADA RYOICHI
BRIDGESTONE KBG CO LTD
| JP2008008997A | 2008-01-17 | |||
| JP2000129816A | 2000-05-09 | |||
| JPH10266386A | 1998-10-06 | |||
| JP2002137318A | 2002-05-14 | |||
| JP2002201731A | 2002-07-19 |