“…Speech enhancement is essential to ensure the satisfactory perceptual quality and intelligibility of speech signals in many speech applications, such as hearing aids and speech communication with mobile phones and hands-free systems [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ]. Currently, devices with multiple microphones are popular, which has enabled multi-microphone speech enhancement, exploiting spatial information as well as spectro-temporal characteristics of the input signals [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ,…”