2.07 - Vowels Flashcards
Vowel are perceptually _______. What does this mean?
Salient
Vowels are typically the most intense portion of a syllable
Vowels are the only speech sounds produced with a relatively _______.
Open vocal tract
American English vowels are typically _______.
Voiced
What are the four features of vowels?
Tongue height (low to high)
Tongue backness (front to back)
Lip Rounding (yes or no)
Tenseness (tense vs. lax)
Tense vowels tend to be associated with ______ extreme tongue position than lax vowels and tend to be _______ in duration.
More
Longer
Are tense vowels usually in open or closed syllables?
Either
Lax vowels tend to be associated with ______ extreme tongue position than tense vowels and tend to be ______ in duration.
Less
Shorter
Lax vowels are typically limited to ______ syllables.
Closed
What concerns vowels more: the source or the shape?
The shape
Formants are concentrations of _______ in the spectrum that correspond to the _________.
Energy
Vocal tract resonance frequencies
What formant has the lowest frequency concentration?
F1
What formants are usually needed for vowel recognition?
F1
F2
Typically, ________ have larger bandwidths.
Higher formants
Formant transitions indicate ______.
Articulatory changes
F1 is inversely related with _______. The higher the vowel, the ______ the F1.
Tongue height
Lower
F1 is responsive to changes in the _______. (_______ openings result in lower F1)
Mouth opening
Small
F2 is related to _______. F2 goes ______ as the tongue moves forward.)
Tongue advancement
Up
F2 is responsive to changes in the ________.
_______ and ______ lower F2.
Size of the oral cavity
Backing
Lip rounding
F1, F2, F3, & F4 are generally lowered by _________.
Lip rounding
What is the primary cue that overcomes the lack of invariance problem?
F1 & F2
What are the two secondary cues that overcome the lack of invariance problem?
Vowel duration (short or long)
Intensity
Does vowel pitch help overcome the lack of invariance problem?
No
Do F1 & F2 frequencies vary from speaker to speaker?
Yes
F3 stays pretty ______.
Constant
If you had a hearing loss between 2500-3000 Hz, would it affect your ability to hear the “6 American English vowels and their formants”?
No
A hearing loss below _______ Hz would not prevent you from hearing the vowel specifically but they will still sound different because you will be missing information.
1500 Hz
Are all vowels extremely different from each other?
2
No
Some vowels are more similar to others but are still easily distinguished
What are the four potential acoustic cues in vowel perception?
Static Properties
Dynamic Properties
Intrinsic-Relational Properties
Extrinsic-Relational Properties
What are Static Properties of Vowel Perception?
3
Steady-state formant frequencies
Fundamental phonetic environment
(Surrounding sounds, speaking rate)
What are Dynamic Properties of Vowel Perception?
2
Inherent spectral change
Consonantal context effects (relative to vowel amplification)
What are Intrinsic-Relational Properties of Vowel Perception?
(2)
Intra-Segmental
Relations among the fundamental and formant frequencies within vowels
What are Extrinsic Relational Properties of Vowel Perception?
(3)
Transsegmental
Relative vowel duration
Relative formant frequencies of a vowel (as compared to other vowels produced by the same speaker)
Tense vowels tend to be _______ than lax vowels.
Longer
If you don’t track the rate of speech then you cannot use ______ as a speech cue.
Duration
Generally low vowels (those produced lower in the mouth) are ______ intense than high vowels.
More
Typically lower vowels have _____ F0.
Lower
Who has the highest intrinsic vowel pitch? Who has the lowest?
Children
Men
Intrinsic pitch gives us insight into _____ and _____.
Gender
Age
Does intrinsic vowel pitch seem to play a role in speech perception?q
No
What can intrinsic vowel pitch be used for?
To see if a deaf child is making the right speech movements
Intrinsic Pitch for Vowels shows us _____ position.
Hyoid
What are the two theories of Vowel Perception?
Intrinsic Factor Theories
Extrinsic Factor Theories
Where do Intrinsic Factor Theories look for information?
In the vowel itself
According to Intrinsic Factor Theories, what three things may determine vowel identity?
Single formant frequencies
Ranges of formant frequencies
Ratios of formant frequencies
Where do Extrinsic Factor Theories look for information?
Outside the vowel
According to Extrinsic Factor Theories, what three things may determine vowel identity?
“Normalizing” using the point vowels
“Estimating” the speaker’s vocal tract (to determine vowel pitch)
Using formant transitions of consonants
Can a single, unique formant frequency determine vowel identity? Why?
No.
Formants can and will change between speakers
Can ranges of formant frequencies determine vowel identity? Why?
Sometimes but this is not trustworthy
Some vowels have unique ranges but others have more overlap
Can ratios of formant frequencies determine vowel identity? Why?
No.
This is only clear in the front vowels. Back & Mid vowels are more similar and overlap
What are three difficulties to using only formants to determine vowel identity?
There is great variability between formant values and ranges
There are overlapping areas in formant ranges
This ignores other factors that may also give us clues
What are three difficulties in only using Formant Ratios in determining vowel identity?
Variability
Male, female, and children’s vocal tracts are not scale models of each other
This ignores other cues that may exist
The distance from an average male’s glottis to velum is _____ cm.
9.1 cm
The distance from an average female’s glottis to velum is _____ cm.
7 cm
The distance from an average male’s pharyngeal wall to incisors is _____ cm.
8.25 cm
The distance from an average female’s pharyngeal wall to incisors is _____ cm.
7 cm
What are the difficulties in only using Formant Ratios with F0?
Variability
Ignores other relevant factors
Vowels vary along ______ dimensions.
Three
What are the three dimensions in which vowels vary?
X = log(SF3/SF2)
Y = log(SF1/SR)
Z = log(SF2/SF1)
What is SR? What is it’s value?
Sensory Reference
168
What is the Tetrahedron?
A three axis graph that looks at the three dimensions of vowels
What was the extrinsic example given in lecture?
That the same symbol can look like “B” of “13” depending on whether it’s in “A __ C” or “12 __ 14”
Do Formant Ratios with F0 solve the lack of invariance problem?
No
Extrinsic perception changes according to what ______.
You expect
Are Formant Ranges and Formant Ratio theories intrinsic or extrinsic?
Intrinsic
Is the Vocal Tract Normalization theory intrinsic or extrinsic?
Extrinsic
What is the Vocal Tract Normalization?
Listeners estimate/infer the speaker’s vocal tract
This is used to normalize informations to perceive the correct vowel
What stimuli did the Vocal Tract Normalization use?
A vowel sandwiched in between /b/ and /t/
What happened in the Vocal Tract Normalization experiment? What happened?
F1 was shifted down (to stimulate a larger vocal tract)
????
In a word, the preceding sound affects the ______ of the ________.
Interpretation
Current sound
What is the Point Vowel Normalization theory?
That listeners calibrate vowels based on the location of the point (corner) vowels (/i/, /u/, /ɑ/)
Why are point vowels so imporant?
They are more stable
Did Liberman & Gerstman find a significant difference in our ability to interpret a vowel when point vowels were provided?
No
When did Liberman & Gerstman find a significant difference in our ability to interpret a vowel?
When all the speaker’s vowels (entire inventory) were presented together
What are the three point vowels?
/i/
/u/
/ɑ/
What is the Dynamic Specification Model theory?
We consider all the various cues
What are the various cues of Dynamic Specification Model?
Control
Silent centers
Centers alone
Initial portions
Final portions
Abutted syllables
What is the Control Cue of the Dynamic Specification Model?
C V C
What is the Silent Center Cue of the Dynamic Specification Model?
C … C
What is the Centers Alone Cue of the Dynamic Specification Model?
… V …
What is the Initial Portion Cue of the Dynamic Specification Model?
C … …
What is the Final Portion Cue of the Dynamic Specification Model?
… … C
What is the Abutted Syllable Cue of the Dynamic Specification Model?
C C
The Vowel is cut out and Consonants are moved together
In the Dynamic Specification Model, which two conditions produced the smallest amount of errors?
Control Syllables
Silent Centers
What are the four cues that are important to speech perception?
Static Properties
Dynamic Properties
Intrinsic (Intra-Segmental) Relational Properties
Extrinsic (Transsegmental) Relational Properties
What are Static Properties?
2
Steady state formant frequencies
Fundamental phonetic environment
What are Dynamic Properties?
3
Inherent spectral changes
Consonantal context effects
Relative vowel amplitude
What are Intrinsic (Intra-Segmental) Relational Properties?
Relations among fundamental & formant frequencies within vowels
What are Extrinsic (Transsegmental) Relational Properties?
2
Vowel duration
Formant frequencies of a vowel compared to those of other vowels from the same speaker