Dictaphone suppressor Daudio BDA-3

  • Ultrasonic exposure + voice imitation (white noise) 100% suppression
  • 7 ultrasonic transducers and powerful speaker
  • Absolutely soundless operation possible
  • Jamming range, max — up to 7 m (23 ft), optimal — 2 m (7 ft) - see important operation instructions below!
  • Very powerful emission — up to 120 dB
  • Able to plug in external speakers for big rooms
  • Detailed English manual included

BDA-3

Dictaphone jammer BugHunter BDA-3

Microphone suppressor "DAudio bda-3 Voices" with 7 ultrasonic transducers with an improved jamming system and an option to connect up to 4 additional external ultrasonic speakers. It has 2 additional transducers on the top panel that create a "virtual wall" for maximum protection against sound recording devices. Device blocks most types of microphones and dictaphones (including professional ones) in the range of up to 7 meters (23 ft) and at even greater range when using the external ultrasonic speaker. For a maximal efficiency of ultrasonic interference it is advised to engage "TURBO mode". Acoustic interference volume can be adjusted (and even turned off for a completely silent operation), power can be supplied through a 110/220V power source or built-in battery.

Ultrasonic speaker is not supplied with the suppressor and is sold separately. If needed, you can attach two speakers via a regular splitter for a 3,5 mm jack.

Operation

Operation Principles

Device generates ultrasonic signal through 7 transducers. Frequency is determined by a micro-controller and variates according to a specially developed algorithm. Ultrasonic signal affects recording paths of spyware which results in them fixating only indiscriminate noise in which conversation can’t be distinguished.

Besides, a powerful speaker creates acoustic speech-like interference which destroys the meaning of the conversation: because of it spyware fixates only muttering, restoring the conversation becomes physically impossible. Acoustic interference is generated randomly so it can’t be filtered out even with special equipment.

Anybody, even a non-professional can use the device. Just point the transducers in a direction of an expected location of recording devices and turn it on. Adjust the volume level of the acoustic signal if needed. Notice that you can make your protection more reliable by using an additional ultrasonic speaker.

OPERATION GUIDELINES

Please consult with us before the purchase if you haven't used such devices before or you plan to use it against water-resistant and/or noice canceling phones (iPhones X and newer). The device requires meeting certain criteria for effective suppression of microphones, ultrasound needs to be in the direct reach of the microphone membrane, pointed at it. It will NOT work if you hide it.

Effective use of the device is only possible when observing certain operation conditions. While we consider the device the best of its kind, it is not a miracle wand.

1. Ultrasonic transducers MUST be directed towards the recording device(s). Ultrasound gets reflected from hard surfaces and absorbed by soft materials. Any obstacles on the way of ultrasound reduces its effectiveness against recording considerably. It cannot be hidden behind objects or clothes such as pockets.

2. The device has to be located BETWEEN the speaking person and the recording device. Only in this case it can serve as a virtual wall and voice can be mixed ultrasonic waves.

3. For water-resistant and noise-cancelling recording devices (including newer iPhones X and higher) one "DAudio BDA-3 Voices" would not be sufficient. For such devices a minimum of one (better more) additional external ultrasonic speakers are required installed from another side of the main device. Such recorders have several microphones and blocking one of them will make them switch to other microphones.

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Specifications:

Overall dimensions: 170х95х31 mm (6,7x3,7x1,2 in)

Weight (without adapter): 0,3 kg (10,6 lb)

Battery capacity: 3600mAh

External source of power supply: 12 V, 110/220V network

Sound pressure level at 1 m distance from the device, dB: Up to 120

Range:

  • optimal — up to 2 m (7 ft) - water-resistant devices
  • maximum — up to 7 m (23 ft)

Ultrasonic speaker specifications (Not included, sold separately):

Overall dimensions: 95х55х23 mm (3,7x2,2x0,9 in)

Weight (without adapter): 0,08 kg (2,8 oz)

External power source voltage: 12 V, 110/220 V

Power consumption: Up to 0,25 А

Contents

PACKAGE CONTENTS

  • Microphone suppressor "DAudio bda-3 Voices"
  • Power adaptor for electrical mains 110/220V
  • Carton box packaging
  • English manual

Specifications:

Overall dimensions

170 х 95 х 31 mm (6.7 x 3.7 x 1.2 in)

Weight (without adapter)

0.3 kg (10.6 lb)

Battery capacity

3600 mAh (3 х 1200 mAh)

External source of power supply

12 V, 110/220V mains

Sound pressure level at 1 m (3.28 ft)

Up to 120 dB

Effective range

  • optimal — up to 2 m (7 ft);
  • maximal — up to 7 m (23 ft)

Jamming method

Ultrasonic interference + acoustic white noise interference

Charge indication stages

4 (green LED: lit, flashes once per second, flashes 2 times per second, not lit)