FILTER FOR THREE-WAY ACOUSTIC SYSTEM Russian patent published in 2024 - IPC H04R3/12 

FIELD: radio engineering.

SUBSTANCE: invention relates to radio engineering and can be used in acoustic systems of household or professional sound reproducing equipment. Filter for a three-band acoustic system comprises a low-pass (LF) filter, a medium-pass (MF) filter and a high-pass (HF) filter, outputs of which are intended for connection of dynamic heads of low-frequency, medium-frequency and high-frequency ranges, respectively, wherein the low-pass filter includes four inductance coils, all the inductance coils of this filter are made with the same inductance value, wherein the first, second, third and fourth inductance coils are connected in parallel by the first leads to the "plus" input and the second leads are connected in parallel to the first lead of the dynamic head of the low-frequency range, which by the second lead is connected to the "minus" input, the medium-pass filter includes twenty-eight capacitors of the same capacity, wherein the first to fourth capacitors are connected in parallel by the first leads to the "plus" input and the second leads are connected in parallel to the fifth to eighth capacitors first leads, which by the second leads are connected in parallel to the first leads of the capacitors from the ninth to the twelfth, which by the second leads are connected in parallel to the first leads of the capacitors from the thirteenth to the sixteenth, which by second leads are connected in parallel to first lead of dynamic head of mid-frequency range, and the seventeenth to twentieth capacitors are connected in parallel to the second lead of the dynamic head of the mid-frequency range, and second leads are connected in parallel to first leads of capacitors from twenty-first to twenty-fourth, which by second leads are connected in parallel to first leads of capacitors from twenty-fifth to twenty-eighth, which by second leads are connected in parallel to input "minus", and the high-pass filter includes four capacitors of the same capacity, namely the twenty-ninth, thirtieth, thirty-first and thirty-second capacitors, which by the first leads are connected in parallel to the second lead of the dynamic head of the high-frequency range and by the second leads are connected in parallel to the "minus" input, and the dynamic head of the high-frequency range is connected by the first lead to the "plus" input.

EFFECT: high linearity of the phase-frequency characteristic of the filter while maintaining the uniformity of its amplitude-frequency characteristic with the possibility of obtaining a non-distorted signal during filtration, which enables to obtain an integral natural acoustic picture of sound reproduction for a three-way acoustic system.

1 cl, 1 dwg