Patent ID: 9743191
Date: 2017-08-22
CPC Classifications: H04R

Claim:
1. An acoustic apparatus, comprising: a back plate; a diaphragm, the diaphragm and the back plate being disposed in spaced relation to each other and separated by a distance; at least one pillar configured to connect the back plate and the diaphragm; and a plurality of posts extending out of the back plate towards the diaphragm and along the periphery of the diaphragm, wherein the at least one pillar is disposed in a spaced relationship with the plurality of posts, wherein under electric bias, a portion of the diaphragm disposed adjacent to an area of the back plate between the at least one pillar and the plurality of posts is closer to the back plate than portions of the diaphragm in contact with the plurality of posts and to the at least one pillar.