| 摘要 |
PROBLEM TO BE SOLVED: To provide a voice signal characteristic adjuster capable of effectively preventing the occurrence of howling in an acoustic space in spite of its simple constitution and simple operation. SOLUTION: The voice signal characteristic adjuster is provided with an input for inputting a voice signal, an output for outputting the voice signal, and a signal processor. The signal processor imparts a gain to the voice signal inputted by the input, and transmits the voice signal to the output after removing a frequency component higher than a cut-off frequency. The gain of the signal processor can be adjusted. The gain and the cut-off frequency are interlocked. The more the gain, the lower the cut-off frequency becomes. By this, the following problem can be solved, namely: (1) an operator conventionally adjusts acoustic equipment in the following manner so as to prevent the occurrence of howling in the acoustic space where microphones and speakers coexist; (2) the gain of an amplifier is increased to a level so that a loud-speaking sound with a sufficient sound volume can be provided to the acoustic space, however, the adjustment of the amplifier and that of a low-pass filter must be simultaneously executed, and therefore, adjustment work is complicated, especially, the adjustment work is difficult for an unskilled person. COPYRIGHT: (C)2006,JPO&NCIPI |
