Patent ID: 6082489
Filing Date: 2000-07-04
Classification: B60R,G10K

Abstract:
A sound isolation structure comprising:a a single, flat perforated board in which a plurality of holes are exclusively formed; anda plurality of cylindrical pipe-like portions which extend from peripheral portions of the plurality of holes; wherein:a diameter and a length of a bore defined by each of the pipe-like cylindrical portions are selected in conjunction with a thickness of the single, flat perforated board to define a plurality of first and second pneumatic vibration systems wherein the air which is located within each of the pipe-like cylindrical portions acts as a first mass, while a first portion of the air which is located adjacent the outer diameter of the pipe-like cylindrical portions acts as a second mass and a remaining second portion of the air which is located adjacent the outer diameter of the pipe-like cylindrical portions acts as a spring which is associated with the second mass.