16. A method for improving speech comprising: in one or more computing devices: modeling background noise from an input signal comprising a desired signal and a plurality of undesired signals; processing at least one of the signals that comprise the input to generate a signal-to-noise ratio; generating an articulation index of the at least one of the signals that is processed; and adjusting a spectrum of a speech segment to improve an intelligibility and quality of the speech segment based on the articulation index; wherein a shaping logic adjusts the spectrum of the speech segment based on a comparison of the articulation index to a plurality of predetermined thresholds.
16. A method for improving speech comprising: in one or more computing devices: modeling background noise from an input signal comprising a desired signal and a plurality of undesired signals; processing at least one of the signals that comprise the input to generate a signal-to-noise ratio; generating an articulation index of the at least one of the signals that is processed; and adjusting a spectrum of a speech segment to improve an intelligibility and quality of the speech segment based on the articulation index; wherein a shaping logic adjusts the spectrum of the speech segment based on a comparison of the articulation index to a plurality of predetermined thresholds. 18. The method of claim 16 wherein a signal-to-noise processor approximates the signal-to-noise ratio and an articulation index processor is programmed to approximate an articulation index.