GritTec's Noise cancellation (NC) technology of single-microphone solution is used for reducing the external hindrances and background noises in speech signal. NC can be used as for the selection of speech signal, so and for the selection of background noises. Supported signal formats: Windows PCM, A/mu-Law Wave, Microsoft ADPCM (MS ADPCM), Intel ADPCM (IMA ADPCM), Microsoft ACM GSM 6.10 (ACM Waveform).