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both spatial filtering and digital noise reduction, while it improves sensitivity by constructively adding the

capabilities. Often these video systems include microphones to provide audio surveillance. However

the stores are connected to the central station through telephone dial-up equipment. The central station

microphone elements are utilized continuously and constructively, give the Voice Tracker outstanding

surveillance service to fast food restaurants and convenience stores. Video cameras and microphones in

range and sound quality.

Operations for Westec Interactive. Conventional microphones caused our central station staffers to strain

outputs of the 8 individual microphone elements in the array.

staffers often have a dialogue with the store personnel, increasing the importance of having a good

conversation in a noisy convenience store. The Voice Tracker

an acoustic searchlight, in that direction. This creates spatial filtering; "noise" from other parts of the room

McDonald's restaurants. The resulting improvement in audio quality made it possible for the central

microphone as part of the system.

"The Voice Tracker's reduced the background noise from air conditioners, fans, and just the general hum,

surveillance microphone in convenience stores. Westec Interactive markets a central station video

TM as a

Voice TrackerTM Array Microphone

is not picked up. This noise reduction, coupled with increased sensitivity since the Voice Tracker's eight

Many convenience and fast food stores have video systems to provide real-time or stored surveillance

conventional far field microphones have proven to be ineffective in a noisy environment.

so we could understand what was being said near the cash registers", said John Varneau, VP of

surveillance applications.

stores. These ceiling mounted microphones were then field tested in 7-Elevens, Circle K's and

Westec Interactive was the first company to recognize the potential of the Voice Tracker

TM array microphone has proven to be very effective in recording

The Voice Tracker's unique technology locates a talker, and electronically steers a "listening beam", like

to understand what they were hearing. "It definitely improved the quality of our security service."

Acoustic Magic's Voice Tracker

station and store personnel.

enhances Convenience Store audio/video

station staffers to hear what was going on in the stores. It also improved the dialogue between the central

TM is effective because it reduces noise by

Westec Interactive mounted 10 Voice Tracker's in housings that could be located in the ceiling of the