ASA 130th Meeting - St. Louis, MO - 1995 Nov 27 .. Dec 01

3aEA13. Reduction of structure-borne noise using an air-voided elastomer.

Sung H. Ko

Naval Undersea Warfare Ctr. Detachment, New London, CT 06320

A theoretical model was developed to evaluate the reduction of structure-borne noise which is generated by a line force applied on an infinite plate using an elastomeric baffle. The vibrating plate is covered with an elastomeric baffle layer to reduce the noise generated by the structural vibration. The vibrating plate is perfectly bonded to the elastomeric baffle. The outer surfaces of the vibrating plate and the elastomer baffle are in contact with air and water, respectively. The anallysis for modeling is based on the theory of elasticity and pertinent boundary conditions. Effects of various parameters such as baffle layer dimensions and material properties on the noise reduction are presented.