MICROPHONE ASSEMBLY WITH PARTICLE FILTRATION SYSTEM

    公开(公告)号:US20230412957A1

    公开(公告)日:2023-12-21

    申请号:US18209739

    申请日:2023-06-14

    申请人: Louchen IP, LLC

    IPC分类号: H04R1/08 D04H1/00

    摘要: A microphone assembly having a particle filtration system. The microphone filtration system may include an outer support structure, at least one filtration layer, an inner support structure, and a sleeve. The microphone filtration system is configured to seal a transducer chamber of the microphone assembly from the outside environment, and trap particles that may buildup and corrode a transducer housed by the transducer chamber. The at least one filtration layer of the particle filtration system provides a Minimum Efficient Reporting Value (MERV) rating greater than or equal to 13 while minimizing attenuation and distortion of the soundwaves entering the transducer chamber.

    Cleaning system incorporating stitch bonded cleaning pad with multi-filament stitches

    公开(公告)号:US11464386B2

    公开(公告)日:2022-10-11

    申请号:US17181545

    申请日:2021-02-22

    发明人: Martin Wildeman

    摘要: A cleaning pad structure of stitch bonded construction incorporating one or more substrate layers of an absorbent nonwoven material with an optional additional fluid blocking substrate layer of polymer film or other suitable material in juxtaposed relation to the absorbent nonwoven layers. Stitching yarns are introduced in stitching relation through the substrate layers. One face of the pad defines a cleaning surface of raised yarn loops formed by the stitched yarns. The pad further includes an attachment surface facing away from the cleaning surface. The stitches of yarns across the attachment surface define an engagement surface for attachment to cooperating hooking elements across a surface of a mop head to define a hook and loop attachment system.