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Speech Anatomy (Physiology) > Articulatory System: Physiology > Flashcards

Articulatory System: Physiology Flashcards

(45 cards)

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1
Q

Source filter theory

A
  1. Sound source (V+ or V-) from larynx
  2. Filter (vocal tract modifies sound source)

2.5. Noise source (vocal tract can also be new “source” of noise)

  1. Speech sound (what we perceive as speech)
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2
Q

What is a filter?

A

Tubes= filter
Every “tube” or filter has a natural HZ that they highlight/emphasize/resonate with when a sound is passed through them

Other Hz, they downplay

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3
Q

How does vocal tract act as a filter?

A

When you introduce a complex glottal sound to one end of a vocal tract, the vocal tract filters the frequencies by highlighting resonant Hz.
Results in sound exiting other end of vocal tract as filtered version of complex sound. This filtered sound= recognized as speech!

These highlighted Hz are called formants (frequency peaks) that make speech sounds identifiable

Vocal tract constantly changes shape during speech, resulting in changes of natural resonant Hz constantly

Results in continually different filtered sounds (Speech)

Vocal tract is highly malleable tube that continually filters complex sounds into perceived speech

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4
Q

What is the vocal tract?

A

Flexible, durable, double-barreled tube that can rapidly change chape with 3 cavities

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5
Q

What ways can the 3 cavities be modified in?

A
  1. Pharyngeal cavity: Length and diameter
  2. Oral cavity: Shape and opening
  3. Nasal cavity: added or subtracted

Modifications leads to highlighting different pitches, noise source, or nasal quality respectively

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6
Q

Modifying pharyngeal cavity

A

Basics:
1. Assume voiced glottal source for ease
2. Assume nasal cavity subtracted for ease

3 ways to modify pharyngeal cavity:
1. Length
Lengthen or shorten
2. Diameter
Narrow or widen
3. Combination

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7
Q

Rule of thumb formants

A

Smaller cavity: highlights higher Hz
Larger cavity: highlights lower Hz

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8
Q

Lengthening pharyngeal cavity

A

Lowering the larynx via infrahyoid muscles
Results in larger cavity, highlighting lower Hz

Remember, when larynx goes down, lower Hz

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9
Q

Shortening pharyngeal cavity

A

Raising the larynx via suprahyoid muscles
Results in smaller cavity, highlighting higher Hz

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10
Q

Narrowing pharyngeal cavity

A

Constricting pharyngeal walls via the pharyngeal constrictors
Results in smaller cavity size, highlighting higher Hz

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11
Q

Widening pharyngeal cavity

A

Widening pharyngeal walls via relaxing the constrictors, or with stylopharyngeus
Results in larger cavity, highlighting lower Hz

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12
Q

Combination of length and diameter of pharyngeal cavity

A

Shorter and narrower: Highest Hz
Longer and wider: Lowest Hz

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13
Q

Theory of vowel production

A

Basics:
1. Assume voiced glottal source since all vowels are voiced
2. Assume nasal cavity subtracted since all vowels in English are not nasal

2 ways oral cavity is modified:
1. Shape of oral cavity via tongue and mandible position
2. Shape of exit via lip and mandible position

Oral cavity changes create the formants for vowels

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14
Q

Vocal tract reimagined

A

Rethink oral cavity as a curved open tube of air ignoring all muscles and bones can be change in shape in combination with pharyngeal cavity

Same as actual vocal tract

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15
Q

Modifying oral cavity for vowels

A

3 ways:
1. Vertical jaw/tongue placement
Height: high/low
2. Horizontal tongue placement
Front/back
3. Lip rounding
Rounded/unrounded

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16
Q

/i/

A

High, front tongue
unrounded

Muscles:
Vp closers: Levator palatini and Superior constrictor
Tongue: Geniohyoid, mylohyoid, digastric (anterior), Vertical (flatten),
Lips: Risorius

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17
Q

/u/

A

High and back tongue
rounded

Muscles:
Vp closers: Levator palatini, superior constrictor
Tongue: Palatoglossus, styloglossus
Lips: Orbicularis oris, incisivus labii superior/inferior

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18
Q

/a/

A

Low and back tongue
unrounded

Muscles:
Vp closers: Levator palatini, superior constrictor
Tongue: Hyoglossus, vertical (flatten)
Mandible: Mylohyoid, geniohyoid, digastric (anterior) (depressors)

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19
Q

Theory of consonant acoustics

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A

Glottal source from larynx either voiced or voiceless
Supraglottal filters sound source or acts as a new noise source
Vocal tract for consonants divided into:
1. Nasals (nasal resonance)
2. Fricatives (turbulence)
3. Stops (noise burst)

20
Q

Nasal production

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A

Nasal characteristic produced by adding nasal cavity to vocal tract and closing oral exit for nasal resonance

Basics:
1. Voiced sound source
2. Nasal cavity added
3. Oral cavity exit blocked

21
Q

Shape of open nasal cavity

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A

Remains same for all nasals

22
Q

Anti-formants

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A

Since oral cavity is an obstructed filter, it DAMPENS instead of highlighting frequencies
Smaller cavity: dampens higher Hz
Larger cavity: dampens lower Hz

These dampened Hz are called anti-resonance, anti-formants

23
Q

Rule of thumb antiformants

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A

Smaller cavity: dampens higher Hz
Larger cavity: dampens lower Hz

24
Q

Shape of closed oral cavity

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A

Size of closed oral cavity affects filter characteristics that differentiate nasals
/m/: Large closed oral cavity, dampens lower Hz

/n/: Medium closed oral cavity, dampens middle Hz

/ng/: Smallest closed oral cavity, dampens higher Hz

25
/m/
Muscles: Vp open: Palatopharyngeus, Palatoglossus Lip: Orbicularis oris, buccinator
26
/n/
Vp open: Palatoglossus, palatopharyngeus Tongue: Mylohyoid, geniohyoid, digastric (anterior), superior longitudinal
27
/ng/
Vp open: Palatoglossus, palatopharyngeus Tongue: Palatoglossus, styloglossus
28
Vocal tract as noise source
2 different ways: 1. Adding hissing noise by creating turbulence in speech stream by narrowing airway (fricatives) 2. Adding popping noise by noise bursts created by momentarily blocking speech stream then releasing it (stops) Vocal tract not just a filter: can also be a noise source!
29
Fricative production
Fricatives produced by using vocal tract to create turbulence. Turbulence created by narrowing airflow Turbulence adds hiss-like acoustic quality to speech stream f,v,th,eth,s,z,sh,ezh,h Basics: 1. Glottal sound source can be voiced or voiceless 2. Nasal cavity subtracted 3. Fricatives produced by passing speech stream though narrow tract, causing turbulence 3.5. Sometimes, additional turbulence created via obstacles (sibilants)
30
Size of cavity in front of narrow constriction
Influences fricative characteristics by highlighting certain formants, making them identifiable Same rule as formants Smaller cavity in front of constriction: highlights higher Hz Larger cavity in front of constriction: highlights lower Hz Examples: Labiodentals and dentals have little to no space in front of constriction: exempt Most sibilants apply /s,z/ have less cavity in front of constriction because lips are not protruded and constriction is at alveolar ridge Highlights higher Hz due to smaller cavity /sh,ezh/ have more cavity in front of constriction because lips are protruded and constriction is post-alveolar ridge Highlights lower Hz due to larger cavity
31
3 modifications that change fricatives
1. Glottal sound source 2. Place of constriction/articulation 3. Edge of obstruction
32
1. Glottal sound source modification
Voiced: v,z,ezh,eth Voiceless: f,s,sh,th
33
2. Place of constriction/articulation
Labiodentals /f,v/: Lower lip and upper teeth Muscles: Vp closers: Levator palatini, superior constrictor Lips: orbicularis oris Dentals /th,eth/: Tongue tip between teeth Mucles: Vp closers: Levator palatini, superior constrictor Tongue: Mylohyoid, geniohyoid, digastric (anterior), genioglossus Alveolars /s,z/: Tongue raised and grooved at alveolar ridge Muscles: Vp closers: Levator palatini, superior constrictor Tongue: Mylohyoid, geniohyoid, digastric (anterior), genioglossus Post-alveolars /sh,ezh/: Tongue arched up and flat and curled down, constriction more back than regular alveolar Muscles: Vp closers: Levator palatini, superior constrictor Tongue: Mylohyoid, geniohyoid, digastric (anterior), inferior longitudinal, vertical Lips: orbicularis oris, incisivus labii superior/inferior
34
3. Edge of obstruction modification
2 types: 1. Sharp edge Teeth More turbulent, hissing 2. Broad edge Flat tongue Less turbulent Examples: /s,z/: Sharp edge of obstruction first Teeth Higher Hz sounds /sh,ezh/: Broad edge of obstruction first Flat of tongue Lower Hz sounds When you lose 2 front teeth, the /s/ is not as sharp or high Hz and sounds more like /sh/ because sharp edge turned to broad edge
35
Stops/plosives production
Characteristic sound produced by momentarily occluding and suddenly releasing speech stream Occlusion and release adds pop-like acoustic quality called noise-bursts p,t,k,d,b,g Basics: 1. Glottal sound either voiced or voiceless 2. Nasal subtracted 3. Stop sound produced by brief 1/10th of a second blocking speech stream leading to momentary build up of pressure followed by sudden release (noise burst) 3.5. Some stops may include closure interval followed by aspiration; for voiceless stops only
36
Size of cavity in front of occlusion
Affects resonance characteristics, same rule of thumb Examples: Bilabial /p,b/: No cavity: exempt Alveolar /t,d/: Small cavity in front of occlusion, emphasizes higher Hz Velar /k,g/: Larger cavity in front of occlusion emphasizes lower Hz
37
Modifications of stop sounds
1. Glottal sound source modification 2. Place of occlusion/articulation
38
1. Glottal sound source modification (stops)
Voiced: b,d,g Voiceless: p,t,k
39
2. Place of occlusion/articulation
Bilabial /p,b/: Occlusion with lip compression Muscles: Vp closers: Levator palatini, superior constrictor Lip: Orbicularis oris, buccinator Alveolar /t,d/: Occlusion with tongue tip behind teeth Muscles: Vp closers: Levator palatini, superior constrictor Tongue: Mylohyoid, geniohyoid, digastric (anterior), genioglossus, superior longitudinal Velar /k,g/: Occlusion with tongue dorsum and velum Muscles: Vp closers: Levator palatini, superior constrictor Tongue: Styloglossus, palatoglossus
40
Voice onset time (VOT)
Measurable sound characteristic related to stops and phonation Closure followed by burst, VOT, aspiration, then glottal cycle
41
Whisper
Voiceless glottal source with same vocal tract filter as regular speech Results in recognizable speech comprised ONLY on turbulence
42
Coarticulation overview
From an anatomical perspective, we are fast talkers with slow moving equipment (articulators) Example: We produce 6 syllables/second, 10/12 sounds/second pataka x2 We cannot achieve this speech if we open/close our mouths, fully articulating each sound
43
Coarticulation
Shows us how we are able to talk so fast yet our articulators move so slow Mutual influence of one sound on neighboring sounds 2 types: 1. Anticipatory coarticulation 2. Carry-over coarticulation
44
1. Anticipatory coarticulation
Characteristic of a sound is prepared for production prior to actual production ex. SUE and SEE by /s/, lips are either rounded or spread prior to the vowel Possible because /s/ sound is not influenced by lip rounding Demonstrates how we are fast talkers
45
2. Carry-over coarticulation
When characteristic of a sound continues to be produced even after it is said ex. NO and TOOTS the nasal quality carries over to the vowel, and the roundedness carries over to /ts/ Shows how articulators can be slow moving

Speech Anatomy (Physiology) (21 decks)

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