FOUR-BAND FILTER FOR ACOUSTIC SYSTEM Russian patent published in 2024 - IPC H04R3/12 

FIELD: acoustics.

SUBSTANCE: filter for acoustic system contains four filters, outputs of which are intended for connection of loudspeakers. Low-pass filter consists of first, second and third inductance coils, high-low-pass filter consists of fourth inductance coil, medium-pass filter consists of seven, first-seventh capacitors, and high-pass filter consists of fifteen, eighth-twenty-second capacitors. First output of dynamic head of low-low-frequency range is connected to second output of first inductance coil, which first output is connected to the second inductance coil second output, and its first output is connected to the "plus" at the filter input, second output of dynamic head of low-low-frequency range is connected to the first output of the third inductance coil, and its second output is connected to "minus" at the input to the filter. First output of the high-low-frequency range speaker is connected to the second output of the fourth inductance coil, the first output of the fourth inductance coil is connected to the "plus" at the input to the filter, and second output of dynamic head of high-low frequency range is connected to "minus" at input to filter, first-fourth capacitors are connected in series, wherein first output of first capacitor is connected to the plus at input to filter, and the second output of the fourth capacitor is connected to the first output of the dynamic head of the medium-frequency range, the fifth-seventh capacitors are connected in series.

EFFECT: high linearity of the phase-frequency characteristic of the device while maintaining uniformity of its amplitude-frequency characteristic and simplifying the design.

1 cl, 1 dwg