Patent ID: 11910138
Assignee: KNOWLES ELECTRONICS, LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A microphone assembly comprising:
a microelectromechanical systems (MEMS) transducer, comprising
a transducer substrate,
a diaphragm oriented substantially parallel to the transducer substrate and spaced apart from the transducer substrate to form a gap, and
a counter electrode coupled to the transducer substrate, the counter electrode positioned between the diaphragm and the transducer substrate,
wherein the MEMS transducer generates a signal representative of a change in capacitance between the counter electrode and the diaphragm, and
wherein a back volume of the MEMS transducer is an enclosed volume positioned between the transducer substrate and the diaphragm; and

an integrated circuit that receives the signal, wherein every point within the back volume is a distance less than a thermal boundary layer thickness from a nearest solid surface at an upper limit of an audio frequency band that the integrated circuit is monitoring.