STIFFENING PLATE FOR ACOUSTIC MEMBRANE AND METHOD OF MANUFACTURING SAME

摘要

A method of thinning a multilayer laminate material used for a membrane stiffening plate is provided to obtain a membrane stiffening plate having a thickness less than currently known in the art. The method provides for a significant reduction in the thickness of a membrane stiffening plate and provides for a mechanism to tune the cut-off frequency of a loudspeaker on which the membrane stiffening plate is used.

主权项

1. A stiffening plate for an electroacoustic transducer, the stiffening plate comprised of a multilayer laminate comprising:
a middle layer substantially comprised of a polymer foam; a first outer layer comprised of a metal and disposed on a first side of the middle layer; a second outer layer comprised of a metal and disposed on a second side of the middle layer, the second side being opposite the first side; and first and second bonding layers disposed between the respective first and second outer layers and the middle layer, the bonding layers comprised of an adhesive and configured to affix the outer layers to the middle layer, wherein the multilayer laminate has been compressed without being subjected to heat such that the thickness of the multilayer laminate has been reduced by about 65% to about 75% of its thickness before compression.