PLANAR MAGNETIC DRIVER HAVING TRACE-FREE RADIANT REGION

    公开(公告)号:US20210185450A1

    公开(公告)日:2021-06-17

    申请号:US17175496

    申请日:2021-02-12

    申请人: APPLE INC.

    IPC分类号: H04R9/02 H04R9/06 H04R7/16

    摘要: A planar magnetic driver including a radiating surface having a trace-free central region is described. The driver has a magnet defining an acoustic opening on a central axis. A diaphragm of the planar magnetic driver is held by mounts having a mounting profile around the central axis, and the diaphragm includes a radiating surface facing the acoustic opening. An innermost conductive trace on the diaphragm extends around a central region of the radiating surface within a magnetic flux of the magnet such that no conductive traces are on the central region. A radial distance between the innermost conductive trace and the mounting profile is less than another radial distance between the innermost conductive trace and the central axis. Accordingly, an excursion range of the diaphragm along the central axis is greater than a gap distance between the conductive trace and the magnet. Other aspects are also described and claimed.

    Headphones with tunable dampening features

    公开(公告)号:US10469939B1

    公开(公告)日:2019-11-05

    申请号:US16126333

    申请日:2018-09-10

    申请人: Apple Inc.

    IPC分类号: H04R1/28 H04R1/10 H04R5/033

    摘要: Headphones are disclosed that include a first earcup assembly. The first earcup assembly includes a first speaker and a plurality of tunable acoustic dampeners at least partially surrounding the first speaker. The plurality of acoustic dampeners are configured to dampen standing wave resonances. The headphones include a second earcup assembly and a headband extending between the first and second earcup assemblies. The headband includes first and second opposing ends attached to the first and second earcup assemblies, respectively.

    Planar magnetic driver having trace-free radiant region

    公开(公告)号:US11617039B2

    公开(公告)日:2023-03-28

    申请号:US17175496

    申请日:2021-02-12

    申请人: APPLE INC.

    IPC分类号: H04R9/02 H04R9/06 H04R7/16

    摘要: A planar magnetic driver including a radiating surface having a trace-free central region is described. The driver has a magnet defining an acoustic opening on a central axis. A diaphragm of the planar magnetic driver is held by mounts having a mounting profile around the central axis, and the diaphragm includes a radiating surface facing the acoustic opening. An innermost conductive trace on the diaphragm extends around a central region of the radiating surface within a magnetic flux of the magnet such that no conductive traces are on the central region. A radial distance between the innermost conductive trace and the mounting profile is less than another radial distance between the innermost conductive trace and the central axis. Accordingly, an excursion range of the diaphragm along the central axis is greater than a gap distance between the conductive trace and the magnet. Other aspects are also described and claimed.

    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

    申请人: Apple Inc.

    IPC分类号: H04R1/10 H04R1/28

    摘要: 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.