USJ-03 ceiling

Description

Ultrasound jammer USJ-03-CEILING is a powerful device intended to prevent unwanted eavesdropping or the making of an unauthorised recording using various spy and recording devices, e.g.:
– GSM a UMTS spying devices
– radio spying devices
– mobile phones and PC
– digital and analog dictaphones
– spying devices based on microphone, placed in various things like button, tie, watch, videorecorder and many other common recording devices

How it works
  • The device operates on the principle of saturation the spying device microphone with ultrasound which is of proper frequency and it results into input amplifier circuits limitation.
  • Frequency combination of ultrasound is generated with respect to elimination of local points (nodes) with low level of ultrasound. Device uses two ultrasound ranges 21 and 25kHz, this enhances the efficiency of the device greatly.
  • The USJ-03-CEILING is designed to cover the space in the cone below the installation site with an apex angle of approximately 40°. The device is suitable for placement on the ceiling or for hanging under the ceiling using strings. It can also be placed on any other flat surface to which it is attached using a mounting bracket. Another option is to place it in a hole in the ceiling (plasterboard) using spring clips. The maximum thickness of the ceiling slab is 15mm.
  • Acoustic signal corruption caused by ultrasound and by limitation of electric signals in device.

Technical data

  • type description: USJ-03-CEIL
  • power supply: 170 – 265 V / 50 Hz
  • maximum power consumption: 36 W
  • ultrasound frequency: 21kHz + 25kHz
  • ultrasound beam angle: (-6dB loss): ~ 40°
  • sound pressure level: 122 dB at 1m distance
  • operating temperature range: 0 to 30 °C
  • material: stainless steel
  • colour: brushed stainless steel, painting on request
  • intended for use in dry indoor environments only
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