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homepage Jammers > Ultrasound Audio Jammer
homepage Speech protection system > Ultrasound Audio Jammer
 Audio surveillance
 Video surveillance
 Personal defense
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servizio clienti tel.: 08043730893
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Ultrasound audio jammer

Say stop to voice recorders, microphones, transmitters and other audio spy listening devices.

The JAM-ULTRA is a portable audio jammer able to protect one's privacy from audio spy devices such as analog and digital recorders, audio bugs, cell phones, smartphones, tablets, radio transmitters or any other system with attached microphone. The sound suppression is essentially achieved by the combined action of two types of interference:

  1. Noise produced by ultrasounds acting directly on the microphone;
  2. A pseudorandom signal working on voice frequency (SLI), added to recording, which makes difficult the identification of the original speech sound.

Managers, entrepreneurs, intelligence professionals, speakers, celebrities or individuals in general who want to preserve a high level of secrecy can effectively use the JAM-ULTRA as a professional counter surveillance equipment.

Main features of JAM-ULTRA

  • Two combined interferences
  • Sophisticated ultrasonic sound interference in the frequency range from 24KHz to 26KHz
  • Speech-like interference (SLI) in the frequency range from 300Hz to 18KHz
  • Autonomously working powered by two rechargeable batteries (2600mAh each one)
  • Works both with batteries and external power
  • Battery level indicator
  • Charge balancing battery circuit
  • Extended operation time when on batteries

Many European countries ban the sale within the UE. Check the regulations in force on its own territory before proceeding with the information request.

(on demand)




Technical Specifications
Number of ultrasonic transducers 6
Ultrasonic frequency range 24 - 26KHz
SLI frequency range 300Hz - 18KHz
Type of interference Ultrasounds and SLI
Battery status indicator Available
Fault detection on each ultrasonic transducer channel Available
Type of built-in batteries Li-ion
Each battery capacity 2600mAh
Input voltage 9V @ 1A
External power adapter voltage 100-250V @ 50-60 Hz
Minimum continuous operating time on fully charged batteries 6 hours
Maximum full charge cycle time 10 hours
Operating temperature range 5°C – 40°C
Maximum relative humidity 85%
Dimensions 150x40x35mm
Weight less than 500g

Our support doesn’t end after the purchase. Our technicians will be at your disposal at all times for the resolution of any problems or explanations, recommending on the best use of the product.

Our after-sales consultancy provides the following services:

  • Direct consulting for the best solution of the problem
  • Assembly instructions and product operation
  • Service parts, programming etc.

Order or Ask Informations about this product:


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Disclaimer: The customer is responsible for the knowledge of the laws that rule the use of these devices in his country.
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tel. 0039 080 3026530 - tel. 0039 080 43730893 - fax 0039 080 40731187 - Skype: endoacustica
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