1. A method of identifying an estimate for a noise-reduced value representing a portion of a noise-reduced speech signal, the method comprising: decomposing a portion of a noisy speech signal into a harmonic component and a random component; determining a scaling parameter for at least the harmonic component; multiplying the harmonic component by the scaling parameter for the harmonic component to form a scaled harmonic component; multiplying the random component by a scaling parameter for the random component to form a scaled random component; and summing the scaled harmonic component and the scaled random component to form the noise-reduced value.