SPEAKER SYSTEM DEVICE Russian patent published in 2023 - IPC H04R3/12 

FIELD: radio technology; acoustic filters.

SUBSTANCE: filter for the acoustic system contains a low-low-frequency filter, a high-low-frequency filter, a mid-frequency filter and a high-frequency filter, the outputs of which are intended for connecting dynamic heads of the low-low frequency, upper-low-frequency, mid-frequency and high-frequency ranges, respectively. The first input of the four-band filter is connected to the first output of the first inductor, the first output of the dynamic head of the upper-low frequency range and the first output of the first capacitor, and the second input of the four-band filter is connected to the second output of the second inductor, the second output of the dynamic head of the mid-frequency range and the second output of the second capacitor, wherein the first terminal of the second capacitor is connected to the second terminal of the dynamic head of the high-frequency range, the first terminal of the dynamic head of the mid-range range is connected to the second terminal of the first capacitor and the first terminal of the dynamic head of the high-frequency range, the first terminal of the second inductor is connected to the second terminal of the dynamic head at the high-low-frequency range and the second output of the dynamic head of the low-low-frequency range, and the first output of the dynamic head of the low-low-frequency range is connected to the second output of the first inductor.

EFFECT: increase in the linearity of the phase-frequency characteristic of the filter while maintaining the uniformity of its amplitude-frequency characteristic.

1 cl, 1 dwg