"Buben-ultra" jammer of voice recorders and microphones

The "Buben-ultra" suppressor is designed for complete and (or) partial suppression of the useful audio signal when attempting to record on mobile or stationary recording devices, radio and wired special technical means, remote microphones by generating two types of interference, namely:

interference in the ultrasonic range, directly affecting the microphone membrane;
acoustic pseudo-random signal of the "speech choir" type, to make it difficult to isolate it from the useful signal.
Distinctive features:

Two types of complex interference.
Complex ultrasonic interference in the frequency range from 24 to 26 kHz.
Speech-like interference in the frequency range from 300 Hz to 18 kHz.
Constant power of ultrasonic interference.
Completely mobile version powered by two Li-Ion batteries with a total capacity of 5200 A/h.
Built-in charger, with protection against deep discharge and overcharging of batteries.
Possibility of operation from batteries and an external adapter.
Multi-stage algorithm for analyzing the operation of each ultrasonic channel with a malfunction indication.
Battery charge level indication.
Built-in voltage balancing circuit on batteries to extend their service life.
Increased battery life.