What’s a formant. Towards a Speech Science Teaching Toolbox Stephen M

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Presentation transcript:

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

The Speech Science Toolbox Project Finding us Email: speechtoolboxproject@gmail.com Website: http://homepages.wmich.edu/~stasko/speechtoolboxproject.html Tasko & Finan ASHA 2011 2

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

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

From Titze (1994) Tasko & Finan ASHA 2011 5

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

Same Source, Different Filter Tasko & Finan ASHA 2011 7

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

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

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

Different Source: The Talkbox http://www.youtube.com/watch?v=Q-jrpxL3aP8&noredirect=1 Tasko & Finan ASHA 2011 11

Tasko & Finan ASHA 2011 12

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

The Speech Science Toolbox Project Finding us Email: speechtoolboxproject@gmail.com Website: http://homepages.wmich.edu/~stasko/speechtoolboxproject.html Tasko & Finan ASHA 2011 14