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Ventilation sound transducer and related methods and systems

An acoustic transducer and channel technology, which is applied to electrostatic transducer speakers, electret electrostatic transducers, electrostatic transducer microphones, etc. sound distortion effect

Active Publication Date: 2022-03-22
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When biased by an external load, the operation of an acoustic transducer (whether constructed as a speaker or a microphone) can be negatively affected, or the transducer can become inoperable entirely

Method used

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  • Ventilation sound transducer and related methods and systems
  • Ventilation sound transducer and related methods and systems
  • Ventilation sound transducer and related methods and systems

Examples

Experimental program
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Embodiment Construction

[0064] Various principles relating to ventilating sound transducers and transducer packages, and related methods and systems are described below with reference to specific features. For example, some principles relate to air pressure vents for transducer elements, and other principles relate to air pressure vents for transducer packages. More specifically, but not exclusively, certain aspects relate to vents having complex acoustic impedance to equalize air pressure across an acoustic diaphragm. Vents described in the context of specific configurations are merely specific examples of contemplated vent arrangements chosen as convenient illustrative examples of the principles disclosed. Nonetheless, one or more of the disclosed principles may be incorporated in various other arrangements of acoustic transducers, modules, and systems to achieve any of a variety of corresponding system characteristics.

[0065] Accordingly, ventilation-acoustic transducers, modules, and systems (...

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Abstract

The present disclosure provides a ventilation sound transducer and related methods and systems. An electronic device has an acoustic transducer with an acoustic diaphragm. The diaphragm has opposing first and second major surfaces. The front cavity is disposed adjacent to the first major surface. The rear cavity is disposed adjacent to the second major surface. An elongated passage defines a pneumatic vent and extends from a first end fluidly coupled to the anterior chamber to a second end fluidly coupled to the posterior chamber, thereby fluidly coupling the anterior chamber to the posterior chamber. The elongated channels can have a high aspect ratio (L / D), providing a large air mass to the vent. Elongated channels can be segmented to define higher order filters. For example, segmented channels may have cascaded repeating acoustic mass elements and acoustically compliant elements, providing additional degrees of freedom for tuning to the barometric vents.

Description

[0001] Cross References to Related Applications [0002] This disclosure claims priority to U.S. Patent Application 62 / 853,626, filed May 28, 2019, U.S. Patent Application 16 / 880,812, filed May 21, 2020, and U.S. Patent Application 16 / 880,825, filed May 21, 2020 and benefit, the contents of these US patent applications are incorporated herein in their entirety for all purposes. technical field [0003] This patent application and the subject matter disclosed herein (collectively, the "disclosure") relate generally to ventilation acoustic transducers and related methods and systems. More particularly, but not exclusively, vent arrangements configured to exhibit complex acoustic impedance are described with respect to various electro-acoustic transducers and electronic devices incorporating such transducers. Examples of electroacoustic transducers include speaker transducers and microphone transducers, including, by way of example, MEMS microphone transducers. Background tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R9/02H04R9/06H04R19/02
CPCH04R9/02H04R9/06H04R19/02H04R1/2846H04R1/403H04R17/00H04R19/01H04R19/04B81C1/00119H04R2400/11H04R2499/11H04R2201/003H04R7/16B81C2203/0109B81B2201/0257B81B2203/0338
Inventor P·C·赫鲁迪J·D·克罗斯比G·哈提波格鲁
Owner APPLE INC
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