verloaded then the peaks of the waves may be flattened off, thus causing a loss in some of the speech signal. This degrades the quality and naturalness of speech, but does not greatly affect the intelligibility of speech (Moore, 1997). ConclusionWhen discussing speech perception, one is seldom really concerned about perception of speech alone, but in fact about essential aspects of language. Speech is a complex stimulus varying in both frequency and time. A basic problem in the study of speech perception is to relate speech wave properties to specific linguistic units. A second problem is finding cues in the acoustic waveform that clearly indicates a particular linguistic unit. Often times, a phoneme will only correctly be identified if information obtained from a word or syllable is utilized. Speech is perceived and processed in a different way from non-speech stimuli, called speech mode. Speech intelligibility is relatively unaffected by severe distortions of the signal. Speech is an effective method of communication, which remains reliable under difficult conditions (Moore, 1997)....
