MEMS speaker
    3.
    发明授权

    公开(公告)号:US11917387B2

    公开(公告)日:2024-02-27

    申请号:US18102667

    申请日:2023-01-27

    Applicant: Apple Inc.

    CPC classification number: H04R7/14 B81B3/0021 H04R19/02

    Abstract: Aspects of the subject technology relate to electronic devices having speakers such as microelectromechanical systems (MEMS) speakers. A MEMS speaker can include an electrostatically driven, corrugated MEMS structure to move air without a magnet, coil, or traditional speaker membrane, and thus provide a low-power, compact speaker with a large acoustically active area in a small volume. Neighboring folds in the corrugated MEMS structure may form pairs of MEMS electrodes that can be pushed together and/or pulled apart to deform the MEMS structure in a breathing motion that generates pressure differentials on opposing sides of the corrugated MEMS structure to generate sound. Additional modes of operation are described.

    DYNAMIC VALVE FOR AN ELECTRONIC DEVICE

    公开(公告)号:US20230093626A1

    公开(公告)日:2023-03-23

    申请号:US17482818

    申请日:2021-09-23

    Applicant: Apple Inc.

    Abstract: A portable electronic device comprising: an enclosure having an enclosure wall that forms an interior chamber and a sound output port to an ambient environment; a transducer positioned within the interior chamber and dividing the interior chamber into a front volume chamber coupling a first side of the transducer to the sound output port and a back volume chamber coupled to a second side of the transducer; and an electromechanical valve comprising a number of flaps operable to open and close a vent to the interior chamber, the front volume chamber or the back volume chamber.

    Vented acoustic transducers, and related methods and systems

    公开(公告)号:US11310591B2

    公开(公告)日:2022-04-19

    申请号:US16880825

    申请日:2020-05-21

    Applicant: Apple Inc.

    Abstract: An electronic device has an acoustic transducer with an acoustic diaphragm. The diaphragm has opposed first and second major surfaces. A front volume is positioned adjacent the first major surface. A back volume is positioned adjacent the second major surface. An elongated channel defines a barometric vent and extends from a first end fluidly coupled with the front volume to a second end fluidly coupled with the back volume, fluidly coupling the front volume with the back volume. The elongated channel may have a high aspect ratio (L/D), providing the vent with a substantial air mass. The elongated channel may be segmented to define a higher-order filter. For example, a segmented channel can have a cascade of repeating acoustic-mass and acoustic-compliance units, providing the barometric vent with additional degrees-of-freedom for tuning.

    Dynamic Valve for An Electronic Device

    公开(公告)号:US20250030976A1

    公开(公告)日:2025-01-23

    申请号:US18907278

    申请日:2024-10-04

    Applicant: Apple Inc.

    Abstract: A portable electronic device comprising: an enclosure having an enclosure wall that forms an interior chamber and a sound output port to an ambient environment; a transducer positioned within the interior chamber and dividing the interior chamber into a front volume chamber coupling a first side of the transducer to the sound output port and a back volume chamber coupled to a second side of the transducer; and an electromechanical valve comprising a number of flaps operable to open and close a vent to the interior chamber, the front volume chamber or the back volume chamber.

Patent Agency Ranking