公开(公告)号：US09967664B1

公开(公告)日：2018-05-08

申请号：US15601931

申请日：2017-05-22

Applicant: Apple Inc.

Inventor： Yang Boon Quek ,  Scott P. Porter ,  Roderick B. Hogan ,  Hongdan Tao ,  Suzanne C. Brown ,  Christopher Wilk ,  Nathan A. Johanningsmeier

IPC: H04R3/00 ,  H04R23/00 ,  H04R29/00 ,  H04R9/02 ,  H04R9/06 ,  G01S17/08 ,  G01K7/00

CPC classification number: H04R3/007 ,  G01K7/00 ,  G01S17/08 ,  H04R9/025 ,  H04R9/06 ,  H04R23/008 ,  H04R29/001 ,  H04R2499/11 ,  H04R2499/15

Abstract: A micro speaker assembly including a micro speaker having a top plate, a bottom plate parallel to the top plate, a magnet assembly coupled to one of the top plate or the bottom plate, a compliant member positioned between the magnet assembly and the top plate or the bottom plate, the compliant member operable to be displaced in response to an acoustic input, and a voice coil coupled to the compliant member. The assembly further including an optical sensor coupled to the micro speaker, the optical sensor having a light emitter and a light detector, the light emitter and the light detector being fixedly coupled to the top plate or the bottom plate, and the optical sensor being operable to produce a displacement signal corresponding to a displacement of the compliant member and a temperature signal corresponding to a temperature of the magnet assembly.