Protects against eavesdropping conversations
When conversations matter, silence the threat.
GT-ZERO emits a randomly modulated acoustic signal that physically interferes with microphones — so any recording of the conversation comes back as unintelligible noise.
360°
Omnidirectional coverage
2 m
Guaranteed protection radius
Always on
Silent, on the table
Direct hardware sale is pending Indonesian import and distribution licensing. Today the unit is available deployed within a Zentara engagement — or request a demonstration and we'll notify you when direct purchase opens.
What it stops
Every microphone in the room, defeated.
Laser microphones, phone and laptop mics, hidden recorders, covert listening devices — they turn your most sensitive conversation into your most exposed data. No firewall addresses a physical eavesdropper. GT-ZERO does.
- Audio recorders — analog & digital
- Built-in microphones in mobile phones
- Computers & tablets
- Dedicated listening devices
- Covert recording systems
How it works
It doesn't mask sound. It attacks the microphone.
GT-ZERO emits a randomly modulated acoustic signal in a narrow band of audible and ultrasonic frequencies. That signal physically interferes with microphone elements — causing resonance and distortion at the point of capture.
The recorder still runs. It just records noise. Speech never resolves into anything intelligible, and there's nothing on the network to detect, because there is no network.
Inaudible protection
Operates at 25.5–26.5 kHz — you won't hear a thing.
The protection runs above the range of human hearing. Participants speak normally; the room stays silent to everyone in it. Only the microphones know the difference.
Maintenance-free operation
No complex configuration. Switch it on and the room is protected — nothing to tune, nothing to manage.
Acoustic signal technology
A randomly mutable white-noise algorithm engineered to resonate and distort the diaphragm of any nearby microphone.
Mobile & flexible
Portable and battery-ready for executive suites, negotiations, and off-site meetings — protection that travels.
System specifications
The spec sheet
Everything an operator needs to qualify the unit for a room.
Frequency range
25.5–26.5kHz
Undetectable to human hearing
Sound pressure
117dB
Signal type
Inaudible
Randomly mutable white noise
Coverage
360°
Radius up to 2 metres
Power
12 V
230 V AC
Battery or mains supply
Continuous operation
2 hrs
5 hrs
On battery / on 230 V mains
One family · protect, detect, deny
GT-ZERO protects. The rest of the family completes the room.
Hardware performs best after a professional sweep — then GT-ZERO keeps the room protected between sweeps.
Firewalls end at the wall. GT-ZERO doesn't.
See the unit protect a live room — a working session with the specialists who deploy it. Direct purchase is opening soon; request a demonstration and we'll keep you first in line.