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    • 6. 发明公开
    • Method of detecting enclosure leakage of enclosure mounted loudspeakers
    • Verfahren zur Detektion einesGehäuselecksgehäusemontierterLautsprecher
    • EP2830325A1
    • 2015-01-28
    • EP14176548.7
    • 2014-07-10
    • Analog Devices A/S
    • PAN, YangZHANG, FanjiongBERTHELSEN, Kim SpetzlerDETERMAN, Michael W.
    • H04R3/00
    • H04R29/001H04R3/007H04R3/08
    • The present invention relates in one aspect to a method of detecting enclosure leakage of an electrodynamic loudspeaker mounted in an enclosure or box. The methodology comprises steps of 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 voice coil voltage across the voice coil is also detected and an impedance or admittance of the loudspeaker across a predetermined audio frequency range is detected based on the detected voice coil current and voice coil voltage. A fundamental resonance frequency of the loudspeaker is 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 is detected based on a deviation between the determined the fundamental resonance frequency and the nominal fundamental resonance frequency of the electrodynamic loudspeaker. Another aspect to the invention relates to a corresponding leakage detection assembly for detecting enclosure leakage of an electrodynamic loudspeaker mounted in an enclosure.
    • 本发明在一个方面涉及一种检测安装在外壳或盒中的电动扬声器的外壳泄漏的方法。 该方法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的步骤。 还检测音圈两旁的音圈电压,并且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。 基于检测到的阻抗或导纳来确定扬声器的基本共振频率,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。 基于确定基本共振频率和电动扬声器的额定基本共振频率之间的偏差来检测外壳的声学泄漏。 本发明的另一方面涉及用于检测安装在外壳中的电动扬声器的外壳泄漏的相应的泄漏检测组件。