Microphone jammer “BugHunter DAudio bda-3 Voices” with 7 ultrasonic transducers – new 2018 model with an improved jamming system and an option to connect an additional external ultrasonic speaker. It has 2 additional transducers on the top panel that create a “virtual wall” for maximum protection from sound recording devices. Device blocks any microphones, dictaphones (including professional ones) in the range of 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 220V power source or built-in battery

Key differences from the old model:

New jamming system. “BugHunter DAudio bda-3 Voices” has a new ultrasonic pattern that guarantees even more reliable jamming of spying equipment in its range.

Two vertical ultrasonic transducers create a “virtual wall” In addition to 5 transducers on BDA-2, the new model has two additional transducers located on the top panel of the device. Emitting interference in a vertical direction these two transducers create a “virtual wall” that protects you from any microphones or dictaphones located behind it.

Ability to connect an additional ultrasonic speaker. In comparison to “BugHunter DAudio bda-2 Voices” that supported only acoustic speakers to amplify the acoustic interference, the new model supports connection of ultrasonic speakers via mini-jack cable. Working with an additional speaker “BugHunter DAudio bda-3 Voices” efficiently suppresses even hidden microphones, which are located outside the range of seven main transducers. For maximum efficiency additional speaker can be placed on the side of the speaking person (so that transducers are pointed at him from different directions) or under the table.

UNIQUE! Incredibly high suppression power and range! “BugHunter DAudio bda-3 Voices” emits a very powerful ultrasonic and acoustic signals (up to 120 dB). It can jam microphones at a distance up to 7 m (23ft). Most analogues, especially of Chinese production, are at least 2-3 times weaker even going by the declared characteristics. Emission power is so high that our specialists recommend to keep transducers away from hearing organs to avoid injury.

NEW! TURBO mode for even more effective suppression when you need absolute confidentiality. TURBO mode activates a special generator which emits ultrasound of a slightly different frequency. Interaction of ultrasonic signals of different frequencies creates frequency beats which raise suppression efficiency without raising emission power. It is a

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