CMD 276 Lecture Notes - Lecture 10: Context-Dependent Memory, Voice-Onset Time, Speech Perception
Document Summary
Cmd 276 - lecture 10 - speech perception. How we assign meaning to what the auditory system receives. Occurs by perceiving the whole signal rather than the acoustic features of each sound individually. This is especially difficult given that speech is dynamic and occurs rapidly. Phonemes vary according to coarticulation and prosody. Primary recognition problem that has been addressed by investigators is: How the form of a spoken word is recognized from acoustic information in the speech waveform. There are 3 basic issues addressed repeatedly in speech perception literature. A distinct set of acoustic features corresponds to each phoneme. Each time a certain phoneme is produced, the same acoustic features are identifiable, regardless of context. In a word, a specific sound corresponds to each phoneme. Units of sound that correspond to phonemes are discrete and ordered in a particular sequence. A speech signal can be divided and recombined into independent units that correspond to specific phonemes.