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Newcastle Auditory Group
Segmentation in speech:
On the processing of boundaries and accents
Kai Alter
When it rains]IPh cats and dogs stay at home When it rains cats and dogs]IPh stay at home
(A)..............]IPh....................................................]IPh
....... ]
Processing Intonational boundaries the Closure Positive Shift (CPS)
basic mechanisms of sound segmentation
F7 FZ F8 FC3 FC4 CZ CP5 CP6 PZ O1 O2
Steinhauer, Alter & Friederici, Nature Neuroscience. 1999
Intonational boundaries are essential to understanding speech
basic mechanisms of sound segmentation
neural response
Please note: if presented in isolation, the CPS ‚moves‘ to the position of the IPh
Alter, K. in: Lacheret, A. & J. Francois (eds.). Fonctions et moyens d'expression de la focalisation. 2004
Summary
The CPS is a useful tool to investigate sequencing in sound processing
Thank you for your attention
prosodic boundaries
acoustic input
IPh boundary
IPh boundary
phonological encoding
CPS
CPS
neural response
CPS as a brain marker for sound segmentation
basic mechanisms of sound segmentation
•
in hummed speech (fMRI:
(Pannekamp et al., Journal of Cognitive Neuroscience, 2005) Ischebeck, Friederici & Alter. Cerebral Cortex 2008)
•
•
in music
(Knoesche et al., Journal of Human Brain Mapping, 2005)
CPS as a brain marker for segmentation
basic mechanisms of sound segmentation
segmentation in dialogues
acoustic input
focus accent
phonological encoding
CPS
In this talk…
basic mechanisms of sound segmentation
prosodic boundaries
segmentation in dialogues
other boundaries
Scientific background
Synamps2 system and Neuroscan QuickCap
CPS independent from prosodic cues
(Grube, Griffiths & Alter, in preparation)
Where accentuation intervenes...
Influence of context (focus)
basic mechanisms of sound segmentation
what?
segmentation in dialogues
whom?
accent
accent
Peter promises
Please note:
to SUPPORT
ANNA and ...
accents are ‚focus accents‘ induced by a preceding wh-question German materials with verb-final and focus in-situ patterns
Intonational boundaries are essential to understanding speech
basic mechanisms of sound segmentation
IPh = Intonational phrase boundary
prosodic boundaries
•
in relative clauses
(Isel, Alter & Friederici. Journal of Cognitive Neuroscience, 2005)
•
prosodic boundaries
in parenthetical constructions
(Toepel & Alter. Speech Prosody, 2002)
(A).................]IPh..................... ]
prosodic boundaries
(B)........]IPh.................]IPh......... ]
Grand average over 48 sentences per condition / 48 adults; German materials