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GritTec's Dual Microphone Array solution of Speech Enhancement.
Version 2.00.  
Copyright @ 2009 GritTec Ltd. All Rights Reserved.
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GritTec's Dual microphone array solution of speech enhancement 
is used for the suppression of external hindrances and surrounding 
noises in chosen direction source of the speech. The sources of 
external hindrances can be an external noise of car, speech of 
collocutor, music and any other sounds, coming from directions, 
different from direction of the chosen source of the speech. 
Suppression of external hindrances is descended by mean of the 
acoustical beam-forming - directed diagrams of directivity of 
microphone array. By using acoustical beam-forming techniques, 
the microphone array can "focus" on the speaker's position.

GritTec’s DMA technology can be effectively applied for: 
 - suppression of street noises;
 - suppression of office noises (fan noise, computer noise, 
   background speech and so on);

Applications:
 - Car/Plane audio garniture (CAR KITS);
 - Hands-free speech communication systems;
 - Web-cameras;
 - VoIP telephony or VoIP mobile.

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System requirements:
 - Pentium-III class CPU;
 - 64 Mb RAM;
 - Soundcard;
 - Headphones/Speakers;
 - Microphone
 - Windows 2000/XP.

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Features:
 - Support 2 microphones configurations;
 - Noise suppression not less 15 db;
 - Low level of speech distortion;
 - Delay of the algorithm: 0 ms;
 - Directional microphones: unidirectional configuration 
   (omni-uni directional);
 - Distance between microphones not less 0.025 meters;
 - Distance to the speaker not less 0.2 meters (up to 5 meters);
 - Choice of a direction of a speech source: hand control 
   (Default: direct);
 - Fast adaptation to changing of external noises;
 - Controlled level of Sidelobe Canceller, up to 60 dB;
 - Easy integration with target applications.

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Signal requirement
 - Signal format: 16-bits linear;
 - Sampling rate: 8 kHz, ..., 32 kHz;
 - Channels: 2 (stereo).

Supported format:
 - Windows PCM, 16 bits linear.

=================================================================
GritTec's Dual Microphone Array solution of Speech Enhancement.
Version 2.00.  
Copyright @ 2009 GritTec Ltd. All Rights Reserved.
=================================================================
url: http://www.grittec.com