PRESSURE RELIEF VALVE FOR HEADPHONES

    公开(公告)号:US20220095030A1

    公开(公告)日:2022-03-24

    申请号:US17405914

    申请日:2021-08-18

    Applicant: Apple Inc.

    Abstract: A headphone comprising: two headphone earcups each comprising: an earcup housing defining an active chamber that acoustically couples a sound output side of a speaker to an ear of a user, and an inactive chamber that surrounds the active chamber; and a passive valve assembly configured to open in response to a positive pressure and a negative pressure within the active chamber to fluidly couple the active chamber to the inactive chamber and equalize a pressure between the active chamber and the inactive chamber.

    Dynamic Seals For Adjustable Display Devices

    公开(公告)号:US20210033874A1

    公开(公告)日:2021-02-04

    申请号:US17073551

    申请日:2020-10-19

    Applicant: Apple Inc.

    Abstract: A wearable display system includes a housing, a display module positioned within the housing and including a lens and a display panel, and a seal extending between the housing and the display module. The seal is configured to allow relative movement between the lens and the display panel to adjust focus of the display panel. In one aspect, the seal includes first and second segments with generally linear configurations and a third segment with an arcuate configuration that is positioned between the first and second segments. In another aspect, the seal includes a first portion with an arcuate configuration and a second portion with a linear configuration and a bellows portion. In another aspect, the seal includes corrugations to facilitate controlled deformation of the seal during relative movement of the display module.

    Micro speaker having a hermetically sealed acoustic chamber with increased volume

    公开(公告)号:US10433048B2

    公开(公告)日:2019-10-01

    申请号:US15693329

    申请日:2017-08-31

    Applicant: Apple Inc.

    Abstract: A micro speaker assembly including a speaker enclosure having an enclosure wall separating a surrounding environment from an encased space, wherein the enclosure wall defines, in part, an acoustic channel that acoustically couples the encased space to the surrounding environment, and the enclosure wall comprises a chemically etched insert molded metal portion that is mechanically interlocked and hermetically sealed to a plastic portion. The micro speaker further including a speaker assembly positioned within the encased space, the speaker assembly having a sound radiating surface facing the metal portion of the enclosure wall, a voice coil extending from the sound radiating surface, a magnet assembly having a magnetic gap aligned with the voice coil, and an acoustic chamber formed, in part, by the metal portion of the enclosure wall and the sound radiating surface.

    ACOUSTIC CHAMBERS DAMPED WITH PLURAL RESONANT CHAMBERS, AND RELATED SYSTEMS AND METHODS

    公开(公告)号:US20190281381A1

    公开(公告)日:2019-09-12

    申请号:US15917426

    申请日:2018-03-09

    Applicant: Apple Inc.

    Abstract: An acoustic enclosure has a housing at least partially defining an acoustic chamber for an acoustic radiator. The housing defines an acoustic port from the acoustic chamber to a surrounding environment. An acoustic resonator has a first resonant chamber and a second resonant chamber. The acoustic resonator also has a first duct to acoustically couple the first resonant chamber with the acoustic chamber and a second duct to acoustically couple the second resonant chamber with the first resonant chamber. An electronic device can have an electro-acoustic transducer. Circuitry in the electronic device can drive the electro-acoustic transducer to emit sound over a selected frequency bandwidth. Damping provided by the first and the second resonant chambers can de-emphasize one or more frequencies and/or extend a frequency response of the acoustic enclosure to improve perceived sound quality emitted by the electronic device.

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