The KA157HP3 microcircuits are dynamic noise-canceling filters. Designed for noise reduction systems when listening to sound tracks. The IC consists of: an amplitude detector, a frequency corrector, a control amplifier, a minimum limiter, a voltage-controlled resistor in a noise reduction threshold control goal, a cut-off and cut-off limiter, an algebraic adder, an input voltage follower, a reference voltage and stabilized current source, the amplifier of the controlled filter and the controlled resistors of the 1st and 2nd links of the main controlled filter. They contain 190 integral elements.