October 1, 2007
GritTec laboratory announced new version of dual microphone array solution of speech enhancement.
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. Acoustical beam-forming is defined by the
configuration of microphone array and methods of adaptive
Dual microphone array solution can be effectively
used for audio-video conference systems, for car audio
garniture (Car Kits) or plane audio garniture.
Technology was tested in real condition with using of
electret microphones with uni-direction diagram, distance between
microphones is 0.05 - 0.07 meter, distance to source of the speech
is 0.7 meter.
- high quality of articulation (minimum speech distortion);
- suppression of non-stationary noise;
- fast adaptation;
- using of the cheap electret microphones.
Demonstration version of dual microphone array solution
of speech enhancement is available for test drive on GritTec
GritTec Laboratory specializes on research and development of algorithms and technologies in the field of
speech and audio processing. GritTec's research is focused on speech enhancement, speech concealment, voice
biometric, speech recognition, speech synthesis and other speech and audio technologies.