公开(公告)号：US20170111721A1

公开(公告)日：2017-04-20

申请号：US14887647

申请日：2015-10-20

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Andrew P. Miehl ,  Deborah A. Gruenhagen ,  Gary A. Lee ,  David J. Meyer ,  Karl F. Mueller ,  John Kevin Arledge

IPC: H04R1/08 ,  H05K5/02 ,  H04R1/04 ,  H05K1/18

CPC classification number: H04R1/086 ,  H04M1/035 ,  H04R1/04 ,  H04R1/083 ,  H04R1/2876 ,  H04R1/2884 ,  H04R2420/07 ,  H04R2499/11 ,  H05K1/181 ,  H05K5/0213

Abstract: A method and apparatus are described for providing an acoustically-resistive air-permeable venting structure within a sealed microphone acoustic cavity. A microphone is mounted on a printed circuit board and positioned within a housing. A water-resistant membrane seals the microphone from an exterior of the housing, and a active acoustic cavity establishes an acoustical connection between the water-resistant membrane and the microphone. An acoustically-resistive air-permeable venting structure is formed in the body of the printed circuit board and connects to the active acoustic cavity either directly or via a separate vent path. The venting structure provides a viscous dampening effect by venting an active acoustic cavity of the electronic device to the rest of the enclosure sealed by the water-resistant membrane.

公开(公告)号：US09930435B2

公开(公告)日：2018-03-27

申请号：US14887647

申请日：2015-10-20

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Andrew P. Miehl ,  Deborah A. Gruenhagen ,  Gary A. Lee ,  David J. Meyer ,  Karl F. Mueller ,  John Kevin Arledge

IPC: H04R1/02 ,  H04R1/08 ,  H05K1/18 ,  H05K5/02 ,  H04R1/04 ,  H04M1/03 ,  H04R1/28

CPC classification number: H04R1/086 ,  H04M1/035 ,  H04R1/04 ,  H04R1/083 ,  H04R1/2876 ,  H04R1/2884 ,  H04R2420/07 ,  H04R2499/11 ,  H05K1/181 ,  H05K5/0213

Abstract: A method and apparatus are described for providing an acoustically-resistive air-permeable venting structure within a sealed microphone acoustic cavity. A microphone is mounted on a printed circuit board and positioned within a housing. A water-resistant membrane seals the microphone from an exterior of the housing, and a active acoustic cavity establishes an acoustical connection between the water-resistant membrane and the microphone. An acoustically-resistive air-permeable venting structure is formed in the body of the printed circuit board and connects to the active acoustic cavity either directly or via a separate vent path. The venting structure provides a viscous dampening effect by venting an active acoustic cavity of the electronic device to the rest of the enclosure sealed by the water-resistant membrane.