transcript
- Slide 1
- Slide 2
- Speech perception Relating features of hearing to the
perception of speech
- Slide 3
- The bottom line The auditory system encodes the properties of
sound that are essential to recognizing speech, but its a lot more
complicated than that.
- Slide 4
- Production
- Slide 5
- Acoustics
- Slide 6
- Vowels
- Slide 7
- Consonants Laughter can soothe and heal
- Slide 8
- Place and manner of articulation
- Slide 9
- Speech cues
- Slide 10
- Important acoustic features
- Slide 11
- Envelope v. Spectral Information
- Slide 12
- Fine structure: Voicing
- Slide 13
- Fine structure: Intonation contour Marianna made the
marmalade.
- Slide 14
- Fine structure: Tone split white swing defeat mother high level
hemp rising horse falling- rising scold falling
- Slide 15
- Redundancy leads to robust perception Frequency (Hz) Amplitude
(dB) 2100 400 Hz bandwidth.5 1 1.5 2.0 Amplitude (dB).5 1 1.5 2.0 1
Hz 4 Hz 64 Hz Interrupted Filtered
- Slide 16
- Variability in acoustics: Co-articulation
- Slide 17
- Variability in acoustics: Speaker Winnfield, LAVancouver,
BCBrooklyn, NY
- Slide 18
- Variability in acoustics: Top-down influences another thing
coming OR another think coming?
- Slide 19
- Multisensory integration
- Slide 20
- Conclusions Speech is produced by spectral and temporal
modifications (by articulators) of a vibrating source (vocal
folds). The amplitude spectrum and the envelope of sound carry much
of the information in speech. The fine structure contributes to
pitch-related aspects of speech. Sound associated with a phoneme is
influenced by preceding and following phonemes, by the speaker, and
by many other factors. Speech is highly resistant to corruption and
interference. Acoustic and semantic context important in speech
recognition. Speech is a multisensory phenomenon.