公开(公告)号：US20160286301A1

公开(公告)日：2016-09-29

申请号：US15034075

申请日：2014-11-04

Applicant: DANMARKS TEKNISKE UNIVERSITET

Inventor： Finn Agerkvist ,  Niccolo Antonello ,  Anders Christensen

IPC: H04R1/22 ,  H04R29/00 ,  H04R3/08 ,  H04R9/06 ,  H04R9/02

CPC classification number: H04R1/22 ,  H04R3/08 ,  H04R9/025 ,  H04R9/06 ,  H04R29/003 ,  H04R2201/028 ,  H04R2209/022

Abstract: An electrodynamic loudspeaker assembly having an electrodynamic loudspeaker and first and second compensation filters. The electrodynamic loudspeaker includes a voice coil arranged in an air gap of a magnetically permeable structure and a compensation coil wound around a portion of the magnetically permeable structure. The first compensation filter filters an audio input signal to the loudspeaker assembly with a first frequency response to generate a voice coil compensation signal for application to the voice coil. The second compensation filter filters the audio input signal to the loudspeaker assembly with a second frequency response to generate a second compensation signal for application to the compensation coil. The first and second frequency responses, across a predetermined audio frequency range, suppress a time-varying or AC magnetic flux in the air gap caused by voice coil current such that magnetic flux modulation in the air gap of the loudspeaker is suppressed.

Abstract translation: 一种具有电动扬声器和第一和第二补偿滤波器的电动扬声器组件。 电动扬声器包括布置在导磁结构的气隙中的音圈和缠绕在导磁结构的一部分上的补偿线圈。 第一补偿滤波器以第一频率响应对扬声器组件的音频输入信号进行滤波，以产生用于音圈的音圈补偿信号。 第二补偿滤波器用第二频率响应将音频输入信号滤波到扬声器组件，以产生用于施加到补偿线圈的第二补偿信号。 在预定音频范围内的第一和第二频率响应抑制由音圈电流引起的气隙中的时变或AC磁通，从而抑制扬声器的气隙中的磁通量调制。