Multi-component acoustically resistive layer for acoustical...

Details Multi-component acoustically resistive layer for acoustical... Multi-component acoustically resistive layer for acoustical...

2005-01-11

2005-01-11

Lockett, Kimberly (Department: 2837)

Acoustics

Sound-modifying means

Sound absorbing panels

C181S290000, C181S291000, C181S292000, C181S293000

Reexamination Certificate

active

06840349

ABSTRACT:
A multi-component acoustically resistive layer, for acoustical attenuating panels having a cellular core (1) flanked, on the sound wave arrival side, with an acoustically damping layer (2) and, on the opposite side, with a rear reflector (3), comprises a first structural component (4) in contact with the aerodynamic flow and formed by at least one layer of fibers connected by a suitable resin and oriented in the direction of aerodynamic flow the component (4) comprising a suitable quantity of open surface; a dissipating component (6) disposed against the surface of the first component (4) opposite the flow, formed by a metallic cloth; and a second structural component (7) formed by at least one layer of fibers connected by a suitable resin, oriented orthogonally to the direction of aerodynamic flow. The second structural component (7) is connected to the cellular core (1) and comprises a suitable open surface quantity.

REFERENCES:
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patent: 6790520 (2004-09-01), Todd et al.
patent: 0 895 222 (1999-02-01), None
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