Accession Number:

ADD018975

Title:

Acoustic Absorbing Device.

Descriptive Note:

Patent, Filed 14 May 96, patented 3 Feb 98,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1998-02-03

Pagination or Media Count:

7.0

Abstract:

An acoustically absorbing device is presented which can be mounted in the structure of a vehicle. The acoustic absorbing device includes an acoustic barrier layer proximate the structure surface, an acoustic absorption material layer adjacent the acoustic barrier layer, and isolation mounts mounting the acoustic absorption material to the structure. The acoustic barrier layer includes either a barrier layer of free airspace or a barrier layer of an acoustic barrier material that is heat resistant and fluid resistant. The acoustic absorption layer is made of a material capable of dispersing incident normal pressure waves within the structure, such as a sintered aluminum absorption material. The mounts are typically spaced throughout the structure and typically include an isolation mounting device that provides isolation from vibrations in the structure.

Subject Categories:

  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE