Abstract: The present invention is directed to an acoustical baffle that has use in vehicle interiors, such as an interior headliner. In particular, the baffle can provide improved acoustics while maintaining a desired airflow resistance and can be configured to provide for different sound attenuation characteristics at selected locations of the baffle construction.

Abstract: The present invention is directed to an acoustical baffle that has use in vehicle interiors, such as an interior headliner. In particular, the baffle can provide improved acoustics while maintaining a desired airflow resistance and can be configured to provide for different sound attenuation characteristics at selected locations of the baffle construction.

Abstract: An improved reflective surface includes multiple first truncated triangular trihedral corner reflectors and multiple second truncated triangular trihedral corner reflectors, each including a retro-reflecting component and a scattering component corresponding to a truncation of a triangular trihedral corner reflector by a truncating object having a plurality of corners and a triangular or rectangular shape. The retro-reflecting component is a remaining triangular trihedral corner reflector that remains after the truncation of the triangular trihedral corner reflector and the scattering component is a portion of the truncated triangular trihedral corner reflector other than the remaining triangular trihedral corner reflector, where no corner of the plurality of corners of the truncating object is in alignment with a corner of the opening of the triangular trihedral corner reflector.

Abstract: A fibrous acoustic insulator includes a nonwoven mat having at least a first layer impregnated with a thermoset polymeric material that is liquid-based. A second layer oppositely facing with respect to the first layer is also impregnated with the thermoset polymeric material. An un-impregnated nonwoven material layer defining an inner layer is positioned between the first and second layers. The un-impregnated nonwoven material layer may be shoddy and does not include the thermoset polymeric material, thereby defining an untreated nonwoven material layer.