Title:
REGENERATIVE-SOUND LEVEL AUTOMATIC CONTROL CIRCUIT AND METHOD THEREOF
Document Type and Number:
Japanese Patent JPH04354202
Kind Code:
A
Abstract:
PURPOSE: To suite a reproducing sound level with a reproducing space by automatically controlling volume, while utilizing a prescribed test signal before reproducing a sound to be reproduced by a set. CONSTITUTION: This circuit has preamplifiers 32 and 33 for amplifying an inputted acoustic signal with a prescribed amplification factor and means for reproducing the acoustic signals, outputted from the preamplifiers 32 and 33 through speakers 23 and 24. Further, this circuit is provided with a test signal-generating part 22 for outputting the prescribed test signal and a switching part 27 for selectively switching a main audio signal and the test signal according to a control signal. After the reproduction level of test signal generated from the test signal generatign part 22 has been set to a reference value, the same test signal is outputted into the reproducing space. This signal is again inputted by microphones 20 and 21, a differential value is detected by comparing the reference value with the inputted test signal, and the level of volume 29 is automatically controlled, corresponding to the differnetial value.
Inventors:
RI YOSHIHIDE
CHO SHIGETETSU
CHO SHIGETETSU
Application Number:
JP1532592A
Publication Date:
December 08, 1992
Filing Date:
January 30, 1992
Export Citation:
Assignee:
SAMSUNG ELECTRONIC
International Classes:
H03G3/32; H04R27/00; H04S7/00; (IPC1-7): H03G3/32
Attorney, Agent or Firm:
Yasunori Otsuka (1 person outside)