公开(公告)号：US20130308786A1

公开(公告)日：2013-11-21

申请号：US13952035

申请日：2013-07-26

Applicant: Wolfson Microelectronics Plc

Inventor： Alastair Sibbald ,  Martin Howle

IPC: H04R3/00

CPC classification number: H04R3/002 ,  H04R1/1008 ,  H04R1/1016 ,  H04R1/1083 ,  H04R1/2873

Abstract: An ear-worn speaker carrying device (“ESD”) incorporating active ambient noise reduction circuitry provided with a seal intended to contact or surround the ear of a user. The seal is intended to present a substantial impedance to inward or outward transmission of sound to or from the ear. At least one acoustic channel of predetermined dimensions bypasses the seal, providing an acoustic leakage path of known characteristics, thereby permitting predetermined levels of sound to enter and exit by way of the channel, such that minor variations in leakage are rendered relatively unimportant. In a preferred embodiment, the device further includes an acoustic conduit connected to vent the speaker's rear surface to the external ambient, and respective exit apertures for the acoustic channel and the acoustic conduit are relatively located so that sounds exiting from them tend to cancel each other, reducing sound emissions from the device.

Abstract translation: 一种戴有扬声器的扬声器承载装置（“ESD”），其包括有效的环境降噪电路，其设置有用于接触或围绕用户耳朵的密封。 密封件旨在呈现出向耳朵或从耳朵传出声音的向内或向外传输的实质阻抗。 具有预定尺寸的至少一个声通道绕过密封件，提供已知特性的声学泄漏路径，从而允许预定水平的声音通过通道进入和离开，使得泄漏的微小变化相对不重要。 在优选实施例中，该装置还包括连接到扬声器的后表面以将外部环境排放的声导管，并且用于声通道和声导管的相应出口孔相对定位，使得从它们出来的声音往往彼此抵消 ，减少设备的声音排放。