公开(公告)号：US11146900B2

公开(公告)日：2021-10-12

申请号：US16753609

申请日：2018-12-14

Applicant: Google LLC

Inventor： Michael Asfaw ,  Chad Georges Seguin ,  David C. Breece, III ,  Leonardo Kusumo

IPC: H04R29/00 ,  G01D5/20

Abstract: Techniques, methods, systems, and other mechanisms for measuring the excursion of a speaker while being actively driven. Measuring excursion can involve attaching a flexible printed coil (FPC), including a sense coil, to the speaker, and monitoring an induced current as produced though the sense coil, and further detecting that violation of an excursion limit for the speaker may likely occur.

公开(公告)号：US20210409884A1

公开(公告)日：2021-12-30

申请号：US17473266

申请日：2021-09-13

Applicant: Google LLC

Inventor： Michael Asfaw ,  Chad Georges Seguin ,  David C. Breece, III ,  Leonardo Kusumo

IPC: H04R29/00 ,  G01D5/20

Abstract: Techniques, methods, systems, and other mechanisms for measuring the excursion of a speaker while being actively driven. Measuring excursion can involve attaching a flexible printed coil (FPC), including a sense coil, to the speaker, and monitoring an induced current as produced though the sense coil, and further detecting that violation of an excursion limit for the speaker may likely occur.

公开(公告)号：US10178469B2

公开(公告)日：2019-01-08

申请号：US15175227

申请日：2016-06-07

Applicant: Google LLC

Inventor： Michael Asfaw ,  Chad Seguin

IPC: H04R1/28 ,  G06F3/16 ,  H04R1/02 ,  H04R7/16 ,  H04R9/02 ,  H04R9/06 ,  H04R31/00

Abstract: Embodiments disclosed in the present disclosure relate to vibration transducers. Such a transducer includes an electromagnet having a conductive coil. The conductive coil is configured to be driven by an electrical input signal to generate magnetic fields. The transducer further includes a magnetic diaphragm that is configured to mechanically vibrate in response to the generated magnetic fields. Additionally, the transducer includes a pair of cantilevered arms formed from damping steel. The cantilevered arms couple the magnetic diaphragm to a frame. The magnetic diaphragm vibrates with respect to the frame when the electromagnet is driven by the electrical input signal. Additionally, the pair of flexible support arms are connected to opposing sides of the magnetic diaphragm.

公开(公告)号：US09998829B2

公开(公告)日：2018-06-12

申请号：US15193742

申请日：2016-06-27

Applicant: Google LLC

Inventor： Michael Asfaw

IPC: H04R1/00 ,  H04R9/02 ,  H04R9/06

CPC classification number: H04R9/025 ,  H04R5/027 ,  H04R9/06 ,  H04R2307/204 ,  H04R2420/07 ,  H04R2460/13 ,  H04R2499/15

Abstract: A bone conduction transducer includes a yoke having a pair of arms, a layer of high permeability steel on a surface of the yoke between the arms, a metal coil, a metallic post that extends into a center portion of the metal coil, a diaphragm, an anvil attached to a surface of the diaphragm, a pair of permanent magnets attached to an opposite surface of the diaphragm, and a pair of springs. A first end of each spring is attached to a respective one of the arms of the yoke, and a second end of each spring is coupled to the diaphragm. The diaphragm is configured to vibrate in response to a signal supplied to the metal coil. The diaphragm, anvil, and/or metallic post could be formed from a high permeability steel.

公开(公告)号：US11877126B2

公开(公告)日：2024-01-16

申请号：US17473266

申请日：2021-09-13

Applicant: Google LLC

Inventor： Michael Asfaw ,  Chad Georges Seguin ,  David C. Breece, III ,  Leonardo Kusumo

IPC: H04R29/00 ,  G01D5/20

CPC classification number: H04R29/001 ,  G01D5/2066

Abstract: Techniques, methods, systems, and other mechanisms for measuring the excursion of a speaker while being actively driven. Measuring excursion can involve attaching a flexible printed coil (FPC), including a sense coil, to the speaker, and monitoring an induced current as produced though the sense coil, and further detecting that violation of an excursion limit for the speaker may likely occur.

公开(公告)号：US20200336850A1

公开(公告)日：2020-10-22

申请号：US16753609

申请日：2018-12-14

Applicant: Google LLC

Inventor： Michael Asfaw ,  Chad Georges Seguin ,  David C. Breece, III ,  Leonardo Kusumo

IPC: H04R29/00 ,  G01D5/20

Abstract: Techniques, methods, systems, and other mechanisms for measuring the excursion of a speaker while being actively driven. Measuring excursion can involve attaching a flexible printed coil (FPC), including a sense coil, to the speaker, and monitoring an induced current as produced though the sense coil, and further detecting that violation of an excursion limit for the speaker may likely occur.

公开(公告)号：US20190104368A1

公开(公告)日：2019-04-04

申请号：US15819148

申请日：2017-11-21

Applicant: Google LLC

Inventor： Michael Asfaw ,  Michael Smedegaard

IPC: H04R9/02

Abstract: The present disclosure provides a multi-purpose tweeter yoke. In particular, the yoke can comprise a continuous body. The body can serve as a magnetic flux director and can be shaped to increase surface area such that the yoke serves as a heat sink. In some embodiments, the body can comprise one or more fins that contribute at least in part to the heat sink. The fin(s) can be cylindrically shaped. In some embodiments, the fin(s) can include multiple cylindrically shaped fins that are concentric and define at least one cavity that provides at least a portion of the surface area.