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Acoustic sensor and circuit thereof

An acoustic sensor and circuit technology, applied in the field of acoustic sensor components, can solve the problems of high power consumption, bulky, expensive non-acoustic sensors, etc.

Pending Publication Date: 2022-05-13
KNOWLES ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But these and other single-purpose or dedicated non-acoustic sensors are relatively expensive or bulky and can consume a lot of power

Method used

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  • Acoustic sensor and circuit thereof
  • Acoustic sensor and circuit thereof
  • Acoustic sensor and circuit thereof

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Embodiment Construction

[0012] The present disclosure generally relates to acoustic sensor assemblies and circuits for the sensors capable of detecting non-acoustic conditions or changes thereto. figure 1 is an acoustic sensor assembly 100 that detects acoustic and non-acoustic conditions and generates electrical signals representative of the detected conditions at an analog or digital external device interface of the acoustic sensor assembly. As described herein, non-acoustic conditions may be ambient air pressure or concentrations of gases such as carbon dioxide, methane, and other gases having properties different from air, among others.

[0013] Acoustic sensor assemblies generally include an acoustic transducing element and circuitry disposed in a housing. The transducing elements may be capacitive, piezoelectric or other known or future transducing elements fabricated as microelectromechanical systems (MEMS) or other known or future devices. The circuitry may take the form of one or more integ...

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Abstract

The invention relates to an acoustic sensor and a circuit thereof. An acoustic sensor assembly that generates an electrical signal representative of an acoustic signal includes an acoustic transduction element disposed in a housing and in an acoustic manner, a heat source that causes a change in air pressure within the housing when energized, and an electrical circuit electrically coupled to the acoustic transduction element and contacts on an external device interface of the housing, the circuitry is configured to energize the heat source and determine a non-acoustic condition or a change thereof based on a magnitude of the air pressure change detected by the acoustic transduction element.

Description

technical field [0001] The present disclosure generally relates to acoustic sensor assemblies (eg, MEMS microphones) capable of detecting non-acoustic conditions and circuits for such sensor assemblies. Background technique [0002] Microelectromechanical system (MEMS) microphones are widely used in mobile communication devices, smart speakers, hearing aids, true wireless stereo (TWS) headsets, and various other host device. There is also a potential or developing need for ancillary applications supported by non-acoustic sensor data. Such non-acoustic sensors include gas and air pressure sensors, among other sensors. Air pressure sensors can be used in both barometric and altimeter applications. Gas sensor (such as CO 2 Sensors) can be used to indicate vehicle air quality and indoor air quality, and can be used to monitor the occupancy of enclosed spaces, among other applications. It may also be necessary to monitor the concentration of other gases or their changes. Va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R19/04
CPCH04R19/04H04R2201/003G01H11/06H04R1/04H04R3/06H04R1/08H04R3/00
Inventor S·德克特S·克拉多克M·佩德森
Owner KNOWLES ELECTRONICS INC
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