Knowles Electronics, Inc.

Jose Salazar

Thomas E Miller

Shehab Albahri

Christopher Lane Monti

Charles William King

Yahui Zhang

Kalyan Nadella

John Szczech

Charles Bender King

Sandra Vos

Steve Kearey

William A Ryan

Brenno Varanda

Donald Verghese Jacob

Yu Du

Alex Grossman

Chris Monti

Tim Wickstrom

Matt Manley

Sound-producing acoustic receivers are disclosed. The acoustic receiver includes a receiver housing with a first internal volume and a second internal volume, a first diaphragm separating the first internal volume into a first front volume and a first back volume such that the first front volume has a first sound outlet port, a second diaphragm separating the second internal volume into a second front volume and a second back volume such that the second front volume has a second sound outlet port, a motor disposed at least partially inside the housing such that the motor including an armature mechanically coupled to both the first diaphragm and the second diaphragm, an acoustic seal between the first front volume and the second back volume such that the acoustic seal accommodates the mechanical coupling of the armature to one of the first diaphragm or the second diaphragm.

Acoustic receivers with multiple diaphragms

A balanced armature receiver includes a gas permeable barrier located on a portion of the receiver defining a back volume to provide barometric relief. The barrier can be located in a wall portion or diaphragm of the receiver to vent the back volume to an exterior of the receiver directly, via a front volume, or via a nozzle. The gas permeable barrier is impermeable to liquid infiltration and can be configured to influence the low frequency response of the receiver.

Balanced armature receiver with liquid-resistant pressure relief vent

An acoustic device including a motor disposed in a housing having a non-porous elastomeric membrane disposed across an acoustic path defined by a sound port of the housing is disclosed. The motor may be embodied as MEMS transducer configured to generate an electrical signal responsive to an acoustic signal, or as some other electromechanical device. The membrane has a compliance that is 1 to 100 times a compliance of the acoustic device without the membrane, wherein the membrane prevents ingress of contaminants (e.g., solids, liquids or light) via the sound port while permitting propagation of the acoustic signal along the acoustic path without significant loss.

Acoustic assembly having an acoustically permeable membrane

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Chicago, IL, United States of America

Jose Salazar