The surveillance field has registered rising use of audio bugs during the last decades; these normally can be fixed up in a place, vehicle or room under surveillance working as potent voice transmitters. The audio bugs are equipped with quality microphones to enhance the intensity and quality of sound on receiver end and also increasing its coverage too. The equipment comprises of a camouflaged pc board and an antenna specially designed to escape any notice and function to the maximum. Keeping the feature of undercover on topmost priority they are disguised as a credit card, calculator, a mobile phone and still going further to excel all limits and serve spies and investigators at hard times.
The latest variety includes a digital signal processor which help eliminates surrounding noises and unnecessary echoes interfering or misleading the actual facts. Also, there are facilities available to remotely regulate the instrument and amplification. Many varieties are available apt to work in a frequency range of 850 to 1900 MHz, and these too can be connected to a telephone to bug all incoming outgoing calls, sms’s and even GPRS activities. Though these hi-tech audio bugs have served the spies with accolades and have bagged a stable position in the field but still with ever dynamic and progressive technology it is a matter of concern to look for the latest products to leave behind and spy all competitors in the sphere.