Patent ID: 9226080
Filing Date: 2015-12-29
Classification: H04R

Abstract:
1. A transducer comprising: a first probe plate; a second probe plate; a first ground plate situated between the first and second probe plates; a first electret film adjacent to a first side of the ground plate and situated at least partially between the first and second probe plates; a second electret film adjacent to a second side of the ground plate and situated at least partially between the first and second probe plates, the second side opposite the first side; a second ground plate adjacent a top surface of the first probe plate; a third ground plate adjacent a bottom surface of the second probe plate; a first dielectric situated between the first probe plate and the first ground plate; and a second dielectric situated between the second probe plate and the first ground plate, wherein the first and second probe plates, first ground plate, and first and second dielectrics form an acoustic cantilever that is generally “I” shaped in a vertical cross-section.