公开(公告)号：US09648432B2

公开(公告)日：2017-05-09

申请号：US14059153

申请日：2013-10-21

Applicant: Analog Devices Global

Inventor： Yang Pan ,  Fanjiong Zhang ,  Kim Spetzler Berthelsen ,  Michael W. Determan

IPC: H04R29/00 ,  H04R25/00 ,  H04R3/00 ,  H04R3/08

CPC classification number: H04R29/001 ,  H04R3/007 ,  H04R3/08

Abstract: A method of controlling sound reproduction may include applying an audio signal to a voice coil of the electrodynamic loudspeaker to produce sound, detecting one of an impedance and admittance of the loudspeaker across a predetermined audio frequency range based on a detected voice coil current and voice coil voltage and determining a fundamental resonance frequency of the loudspeaker based on the detected impedance or admittance. The fundamental resonance frequency of the loudspeaker may be compared with a nominal fundamental resonance frequency of the loudspeaker representing a nominal acoustic operating condition of the loudspeaker. A change of operating condition of the loudspeaker may be detected based on a frequency deviation between the determined fundamental resonance frequency and a nominal fundamental resonance frequency of the loudspeaker. The level of the audio signal may be attenuated in response to the frequency deviation meets a predetermined frequency error criterion.

公开(公告)号：US09258659B2

公开(公告)日：2016-02-09

申请号：US13948663

申请日：2013-07-23

Applicant: ANALOG DEVICES GLOBAL

Inventor： Yang Pan ,  Fanjiong Zhang ,  Kim Spetzler Berthelsen ,  Michael W. Determan

IPC: H04R29/00 ,  H04R3/00 ,  H04R3/08

CPC classification number: H04R29/001 ,  H04R3/007 ,  H04R3/08

Abstract: A method of detecting enclosure leakage of an electrodynamic loudspeaker mounted in an enclosure or box may include applying an audio signal to a voice coil of the electrodynamic loudspeaker through an output amplifier and detecting a voice coil current flowing into the voice coil. A voltage across the voice coil may be detected and an impedance or admittance of the loudspeaker across a predetermined audio frequency range may be detected based on the detected voice coil current and voice coil voltage. A fundamental resonance frequency of the loudspeaker may be determined based on the detected impedance or admittance and compared with a nominal fundamental resonance frequency of the loudspeaker representing a sealed state of the enclosure. Acoustic leakage of the enclosure may be detected based on a deviation between the determined the fundamental resonance frequency and the nominal fundamental resonance frequency of the electrodynamic loudspeaker.

Abstract translation: 检测安装在外壳或盒中的电动扬声器的机壳泄漏的方法可以包括通过输出放大器将音频信号施加到电动扬声器的音圈并检测流入音圈的音圈电流。 可以检测音圈两端的电压，并且可以基于检测到的音圈电流和音圈电压来检测扬声器在预定音频范围内的阻抗或导纳。 扬声器的基本共振频率可以基于检测到的阻抗或导纳来确定，并与表示封装的密封状态的扬声器的标称基本共振频率进行比较。 可以基于确定的基本共振频率和电动扬声器的标称基本共振频率之间的偏差来检测外壳的声学泄漏。