FILTER FOR THREE-BAND ACOUSTIC SYSTEM Russian patent published in 2019 - IPC H04R3/12 

FIELD: radio engineering; electronics.

SUBSTANCE: invention relates to radio engineering and can be used in acoustic systems of domestic or professional sound-reproducing equipment. Filter for three-band acoustic system comprises LC-filter of low frequencies and LC-filter of high frequencies, outputs of which are intended for connection of dynamic heads of low-frequency and high-frequency range, first and second input terminals of LC-filter of low frequencies, with which inductance coil output and capacitor output of this filter are respectively connected, are device input, to the first input terminal of LC-filter of low frequencies is connected output of inductance coil of LC-filter of high frequencies, and to the second input terminal of LC-filter of low frequencies is connected output of capacitor of LC-filter of high frequencies, common outputs of inductance coil and capacitor, respectively, in LC-filter of low frequencies and in LC-filter of high frequencies through frequency filter are connected to outputs for connection of dynamic head of mid-range range. LC-filter of low frequencies, LC-filter of high frequencies and frequency filter includes correcting elements.

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

1 cl, 1 dwg