Vehicle acoustic barrier
AssigneeCascade Engineering, Inc.
InventorMichael T. Campbell
Life of this patent
Estimating the term…
Abstract
An acoustic barrier that achieves excellent noise insulating properties, and is relatively thin and relatively light in weight includes a flexible thermoplastic barrier layer having a plurality of apertures defining a latticed structure which includes apertures for pass-through components and non-pass-through apertures. The non-pass-through apertures are located where noise levels are expected or known to be relatively low. Effective acoustic performance can be maintained by completely eliminating material from the relatively thick and dense barrier layer at the low noise levels areas, and providing only absorptive decoupler material and/or lightweight sheet material such as plastic films in those areas.
Claims18
An acoustic treatment assembly comprising at least one acoustic barrier piece attached to a sound absorptive decoupler layer comprised of flexible foam material or fibrous material, the acoustic barrier piece or pieces overlapping less than a majority of the surface area of one side of the sound absorptive decoupler layer.
An acoustic treatment assembly for reducing the transmission of sound through a metal wall separating an engine compartment from a passenger compartment of a motor vehicle, comprising:
- a barrier panel having a plurality of apertures defining a latticed structure;
- and
- a sound absorptive decoupler layer comprised of flexible foam material or fibrous material joined to the latticed structure, the sound absorptive decoupler layer covering certain apertures in the barrier panel, and having a pattern of openings which corresponds with other apertures in the barrier panel, whereby controls and/or other systems are allowed to pass from the engine compartment to the passenger compartment.
An acoustic treatment assembly for reducing the transmission of sound through a metal separating an engine compartment from a passenger compartment of a motor vehicle, comprising:
- a barrier panel comprised of a filled polymer material and having a plurality of apertures defining a latticed structure;
- and
- a sound absorptive decoupler layer comprised of flexible foam material or fibrous material joined to the latticed structure, the sound absorptive decoupler layer covering certain apertures in the barrier panel, and having a pattern of openings which corresponds with other apertures in the barrier panel, whereby controls and/or other systems are allowed to pass from the engine compartment to the passenger compartment.
Dependencies are inferred from the claim text.