公开(公告)号：US20180255401A1

公开(公告)日：2018-09-06

申请号：US15448461

申请日：2017-03-02

Applicant: Google Inc.

Inventor： Michael Asfaw ,  Stephen Thompson ,  Chad Seguin

IPC: H04R9/06 ,  H04R31/00 ,  H04R7/26 ,  G02B27/01

CPC classification number: H04R9/066 ,  G02B27/017 ,  G02B2027/0178 ,  H04R1/028 ,  H04R7/26 ,  H04R11/02 ,  H04R31/006 ,  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 could be formed from a from a permanent magnet.