Multi-technology acoustic energy barrier and absorber

Details Multi-technology acoustic energy barrier and absorber Multi-technology acoustic energy barrier and absorber

1997-02-24

1998-05-19

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Sonar counter-measures

181284, G10K 1116

Patent

active

057544913

ABSTRACT:
A multi-technology acoustic energy barrier and absorber is disclosed that employs the teaching of U.S. Pat. No. 5,400,296 for a matrix material with at least two species of particles with differing characteristic acoustic impedances, in combination with the teaching of U.S. patent Pending Ser. No., 08/780,271, for an "Acoustic Absorption or Damping Material with Integral Viscous Damping," and with the principles underlying constrained-layer dampers.

REFERENCES:
patent: 5272284 (1993-12-01), Schmanski
patent: 5400296 (1995-03-01), Cushman et al.
patent: 5526324 (1996-06-01), Cushman
patent: 5536910 (1996-07-01), Harrold et al.
patent: 5706249 (1998-01-01), Cushman
Hartmann & Jarzyuski "Ultrasonic Hysteresis Absorption in Polymers" J. Appl. Phys. vol. 43, No. 11, Nov. 72.
U.S. application No. 08/780271, Cushman, filed Jan. 9, 1997.

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