<P>PROBLEM TO BE SOLVED: To provide a method and apparatus to classify a portion of an alternative sensor signal as either the signal containing noise or not containing noise. <P>SOLUTION: The portions of the alternative sensor signal that are classified as the signal containing noise are not used to estimate a portion of a clean speech signal and the channel response associated with the alternative sensor. The portions of the alternative sensor signal that are classified as the signal not containing noise are used to estimate a portion of a clean speech signal and the channel response associated with the alternative sensor. <P>COPYRIGHT: (C)2006,JPO&NCIPI 
METHOD AND APPARATUS FOR REDUCING NOISE CORRUPTION BY ALTERNATIVE SENSOR SIGNAL IN MULTI-SENSORY SPEECH ENHANCEMENT