Patent ID: 6249586
Filing Date: 2001-06-19
Classification: H04R

Abstract:
A microphone comprising:a first plate having a first width and a first side;a second plate having a second side positioned across from and at a first separation from said first side,said first separation being less than said first width,a first spacer means disposed between said first and said second sides to hold said first plate and said second plate at said first separation for defining an air gap between said first and said second sides; andan acoustical membrane integrated in said first plate at said first side, said acoustical membrane substantially parallel to said first side, wherein said first plate and said second plate are substantially solid and non-perforated in regions thereof proximate said acoustical membrane such that external sound waves can only gain access to said acoustical membrane after entering into and propagating through said gap in a direction substantially parallel to said acoustical membrane.