公开(公告)号：US6122385A

公开(公告)日：2000-09-19

申请号：US892893

申请日：1997-07-15

申请人： Fumiyasu Konno ,  Sumio Ishihara ,  Akinori Hasegawa

发明人： Fumiyasu Konno ,  Sumio Ishihara ,  Akinori Hasegawa

IPC分类号： H04R3/04 ,  H03G5/16 ,  H04R3/00

CPC分类号： H04R3/002

摘要： The object of the present invention is to offer an sound reproduction apparatus equipped with a speaker having a drastically improved acoustic characteristics securing a stable and high S/N ratio over a wide frequency range. In order to accomplish these objects, the inputted audio signal is amplified by a power amplifier and is reproduced in an acoustic output by driving a speaker, and the reproduced acoustic output is detected by a microphone disposed in a closed cabinet together with said speaker and the detected signal is amplified by a microphone amplifier and is processed by a filter. Then, the output signal from said filter and the input signal to said power amplifier are added and processed, and the difference signal between the added signal and said inputted audio signal is used as an input signal to said power amplifier constituting a negative feedback circuit accomplishing the objects of this invention.

摘要翻译： 本发明的目的是提供一种具有扬声器的声音再现装置，其具有在宽频率范围内确保稳定和高S / N比的显着改善的声学特性。 为了实现这些目的，输入的音频信号被功率放大器放大，并通过驱动扬声器以声输出再现，并且再现的声输出由设置在封闭柜中的麦克风与所述扬声器一起检测，并且 检测信号由麦克风放大器放大并由滤波器处理。 然后，将来自所述滤波器的输出信号和对所述功率放大器的输入信号相加和处理，并将加法信号和所输入的音频信号之间的差信号用作构成负反馈电路的所述功率放大器的输入信号， 本发明的目的。