| 摘要 |
PURPOSE:To enhance the performance of the hearing sense corrector circuit through variation of the hearing correction quantity at the small sound volume band by giving the control to the circuit network which decides the characteristics at the high and low bands each consisting of the capacitor and the resistance by means of the variable resistance means. CONSTITUTION:The serial circuit of high-band correction capacitor 7 and resistance 8 is connected to input terminal 1, along with the parallel circuit comprising variable resistors 11 and 12. Furthermore, slider 11c is connected to the joint of resistances 8 and 12 to be made to touch resistor 11. And reisitor 11 value is divided into 11a and 11b, and slider 12c is provided at the contact where resistor 12 is divided into 12a and 12b to be thenconnected to output end 2. Then the circuit containing low- band correction capacitor 9 and resistance 10 in series is connected to the joint at the side of resistances 8, 11 and 12 each, and the side of resistance 10 is grounded. Thus with operation of sliders 11c and 12c, the hearing correction quantity can be varied along with the sound volume. As a result, the sound pressure level can be improved over the entire region. |
