Important People
One of the founders of acoustic phonetics, he created the source-filter theory which advanced phonetics.
Gunnar Fant
Describe the vocal folds for a non-speech scientist
two flaps of soft, stretchy tissue inside your throat
The vowel /i/ is in this part of the spectrum
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Hyperfunctional dysphonia
This person strived to help people with communication disorders through technological advances for the assessment and treatment of speech and voice disorders
Kenneth Stevens
close, open, close again
This explains why higher-frequency peaks typically have a lower amplitude than the lower-frequency peaks
The energy in the source spectrum decreases with increasing frequency.
The process of receiving the input of a system from its output.
inverse filtering
Who created the original mathematical theory of the vocal tract
This is an example of a voiced and voiceless pair that demonstrates the vibratory cycle
/p/ and /b/ -bilabial stops
/f/ and /v/ -labiodental fricatives
/t/ and /d/ -alveolar stops
/s/ and /z/ -alveolar fricatives
/k/ and /g/ -velar stops
This is the purpose of a spectral analysis
To find out how acoustic energy is distributed across frequency.
Glottal source signal is also referred to as this
Vg signal
Gunnar Fant & Kenneth Stevens
The vocal folds vibrate back and forth in a cycle called the vibratory cycle. During the cycle, the folds move apart and then come back together again. This creates an up-and-down motion in the air, which creates sound waves.
Process of the cycle for non-speech scientist
The vowel /ɑ/ is in this part of the spectrum
middle
These are commons causes of hyperfunctional dysphonia
long-term misuse of voice, acid reflux
This 1960 book was published by Fant
Acoustic Theory of Speech Production
As the air stream passes through the narrowing, a partial vacuum is created which brings the vocal folds together. This repeated interruption of the air stream by the mucous membranes coming together creates a series of pulsation known as a “sound wave”.
Vibratory cycle in clinical terms
The vowel /u/ is in this part of the spectrum
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voice therapy , botox injections and surgery are examples of this
treatment methods for hyperfunctional dysphonia