The interacting multiple model (IMM) algorithm is applied to enhancing spee
ch contaminated by additive white or colored noise, Noisy speech is modeled
by a linear state-space model with Markovian switching parameters. The par
ameters are estimated from the training speech and noise processes. The sim
ulation results show's that the proposed method offers performance gains re
lative to the previous results [4] with slightly increased complexity.