1. What’s a formant. Towards a Speech Science Teaching Toolbox Stephen M
What’s a formant? Towards a Speech Science Teaching Toolbox Stephen M. Tasko Ph.D. CCC-SLP Western Michigan University Donald S. Finan Ph.D. University of Northern Colorado
Tasko & Finan ASHA 2011 1

2. The Speech Science Toolbox Project
Finding us
Website:
Tasko & Finan ASHA 2011 2

3. Difficult Concepts? Source Filter theory of speech production
Understanding resonance
...so how do we teach the concept of resonance?
Tasko & Finan ASHA 2011 3

4. Source Filter Theory of Speech Production
Assumptions in a nutshell
What we hear coming out of someone’s mouth is the consequence of
The generation of a sound source
Filtering of that sound source via the vocal tract’s resonant properties
The source and filter operate in a largely independent manner
Tasko & Finan ASHA 2011 4

5. From Titze (1994)
Tasko & Finan ASHA 2011 5

6. Standard Illustration of Source Filter Theory
Speech
(What We Hear)
Source
(Phonation)
Filter
(Resonator)
Frequency Response
Curve
Input Spectrum
Output Spectrum
Tasko & Finan ASHA 2011 6

7. Same Source, Different Filter
Tasko & Finan ASHA 2011 7

8. Different Source, Same Filters
White Noise
Tasko & Finan ASHA 2011 8

9. Different Source, Same Filters (Human)
burp
snore
Lip buzz ?
Tasko & Finan ASHA 2011 9

10. Different Source, Same Filters (Non-Human)
Tasko & Finan ASHA 2011 10

11. Different Source: The Talkbox
Tasko & Finan ASHA 2011 11

12. Tasko & Finan ASHA 2011 12

13. Software Aids for Teaching Source-Filter Theory
Birkholtz
Huckvale
Esystem
VTDemo
Tasko & Finan ASHA 2011 13

14. The Speech Science Toolbox Project
Finding us
Website:
Tasko & Finan ASHA 2011 14