Scanning “Listening Beam”
Unlike conventional microphones, or first generation array microphones, which have a fixed “listen” direction, Acoustic Magic Voice Tracker™ Array Microphones automatically locate the active talker and electronically steers a “listening beam” in that direction. It can direct its “listening beam” over a 360 degree range, creating a wide field of view. For Meeting Recording or Lecture Capture or Conferencing Applications, the Voice Tracker™ Array Microphones capture all the participants since the “listening beam” moves from one talker to the next in milliseconds. For speech recognition applications, it is no longer necessary to sit rigidly in front of the microphone. The user is free to lean backwards, sideways, or even move around.
Spatial Filtering for Noise Reduction
The Voice Tracker™ Array Microphone improves signal-to-noise ratios in two ways.
- First, its digital signal processor creates a listening beam (like a searchlight) that focuses on the talker and spatially filters noise from other directions.
- Second, its proprietary noise reduction algorithms filter out background noise and reverberations that are present in the acoustic environment.
Constructive Addition of Multiple Microphones for High Sensitivity
Voice Tracker’s adds the audio signals from the always-on microphone elements, but not the noise.
Rapidly Converging AEC Algorithm
Since the acoustic characteristics of a scanning array microphone change as it moves its listening beam around the room, it is necessary that the AEC algorithm have an extremely fast convergence time. The Voice Tracker™ II AEC algorithm is the fastest in the world.
Embedded Algorithms for Ease of Use
Our patented steering technology employs digital electronics and proprietary embedded algorithms. There are no moving parts, so the Voice Tracker™ Array Microphone is rugged, reliable, and easy to use. Simply plug it into your computer. No software needs to be loaded, and there is no drain on your computer’s processing capacity.
There Are Three Voice Tracker™ Models
The Voice Tracker™ I is optimized for recording, and conventional conferencing applications.
The Voice Tracker™ II is optimized for VoIP conferencing applications.
The Voice Tracker™ III is an updated version of the Voice Tracker I with improved pickup range and frequency response.
*All Voice Tracker™ microphones incorporate patented scanning beam microphone array technology exclusively licensed from Brown University.