公开(公告)号：EP2584792A1

公开(公告)日：2013-04-24

申请号：EP13151672.6

申请日：2008-01-10

申请人： Toa Corporation

发明人： Asada, Kazuma ,  Andoh, Hirotomo ,  Ogawa, Tsuyoshi

IPC分类号： H04R3/00 ,  H04R29/00

CPC分类号： H04R29/001 ,  H04R29/007

摘要： An audio signal from an audio signal source 2 is amplified in an amplifier 4, and the amplified audio signal is supplied through a loudspeaker line 6 to a plurality of loudspeakers 8 connected in parallel with each other. A test signal from a DSP 10 containing one or both of a frequency near the lowest frequency of the human audio frequency band and a frequency near the highest frequency, is combined with the audio signal in a combiner 13 and supplied to the loudspeaker line 6. Output signals of a current detecting circuit 14 and a voltage detecting circuit 16 disposed in the output of the amplifier 4 are supplied to a DSP 10 to analyze frequency components of the test signal, and a composite impedance of the loudspeakers 8 and the loudspeaker line 6 is computed based on the frequency component analysis. The DSP 10 compares the composite impedance with a threshold value to detect line breakage or decrease in impedance of the loudspeaker line.

摘要翻译： 来自音频信号源2的音频信号在放大器4中被放大，并且放大的音频信号通过扬声器线6提供给彼此并联连接的多个扬声器8。 来自DSP 10的包含人类音频频带的最低频率附近的频率中的一个或两个以及接近最高频率的频率的测试信号与组合器13中的音频信号组合并提供给扬声器线路6。 设置在放大器4的输出端的电流检测电路14和电压检测电路16的输出信号被提供给DSP 10，以分析测试信号的频率分量，以及扬声器8和扬声器线6的复合阻抗 是基于频率分量分析计算的。 DSP 10将复合阻抗与阈值进行比较，以检测扬声器线路的线路断线或阻抗的降低。

公开(公告)号：EP2584792B2

公开(公告)日：2018-09-12

申请号：EP13151672.6

申请日：2008-01-10

申请人： Toa Corporation

发明人： Asada, Kazuma ,  Andoh, Hirotomo ,  Ogawa, Tsuyoshi

IPC分类号： H04R3/00 ,  H04R29/00

CPC分类号： H04R29/001 ,  H04R29/007

摘要： [Object] An audio signal from an audio signal source 2 is amplified in an amplifier 4, and the amplified audio signal is supplied through a loudspeaker line 6 to a plurality of loudspeakers 8 connected in parallel with each other. A test signal from a DSP 10 containing one or both of a frequency near the lowest frequency of the human audio frequency band and a frequency near the highest frequency, is combined with the audio signal in a combiner 13 and supplied to the loudspeaker line 6. Output signals of a current detecting circuit 14 and a voltage detecting circuit 16 disposed in the output of the amplifier 4 are supplied to a DSP 10 to analyze frequency components of the test signal, and a composite impedance of the loudspeakers 8 and the loudspeaker line 6 is computed based on the frequency component analysis. The DSP 10 compares the composite impedance with a threshold value to detect line breakage or decrease in impedance of the loudspeaker line.

公开(公告)号：EP2584792B1

公开(公告)日：2014-04-16

申请号：EP13151672.6

申请日：2008-01-10

申请人： Toa Corporation

发明人： Asada, Kazuma ,  Andoh, Hirotomo ,  Ogawa, Tsuyoshi

IPC分类号： H04R3/00 ,  H04R29/00

CPC分类号： H04R29/001 ,  H04R29/007