1. A system configured to perform voice enhancement and/or speech features extraction on noisy audio signals, the system comprising: a memory storing computer executable instructions; and one or more processors coupled to the memory and configured to execute the computer executable instructions to: segment an input signal into discrete successive time windows, the input signal conveying audio comprising a speech component superimposed on a noise component, the time windows including a first time window spanning a duration greater than a sampling interval of the input signal; perform a transform on individual time windows of the input signal to obtain corresponding sound models of the input signal in the individual time windows, the sound models including a first sound model including a superposition of harmonics sharing a common pitch and chirp in the first time window of the input signal, pitch being the rate of change of phase over time, chirp being the rate of change of pitch over time; and obtain linear fits in time of the sound models over individual time windows of the input signal, the linear fits including a first linear fit in time of the first sound model over the first time window.