Understanding Vowel Representation
Unlike consonants, which are categorized by specific points of obstruction in the vocal tract, vowels are produced with relatively open airflow. The IPA represents vowels based on three primary dimensions:
- Height (vertical axis): How close the tongue is to the roof of the mouth — close/high, mid, or open/low
- Backness (horizontal axis): Whether the tongue is positioned toward the front or back of the mouth
- Roundedness: Whether the lips are rounded or unrounded
The IPA vowel chart is often called the "vowel quadrilateral" because it approximates the shape of the oral cavity when viewed from the side.
Cardinal Vowels
Daniel Jones established the cardinal vowel system in the early 20th century as reference points for describing vowels in any language. These are not vowels from any specific language but rather auditory/articulatory targets that define the vowel space.
Primary Cardinal Vowels (1–8)
| Number | IPA Symbol | Description | Approximate Example |
|---|---|---|---|
| 1 | i | Close front unrounded | French "si", Spanish "sí" |
| 2 | e | Close-mid front unrounded | French "été", Spanish "peso" |
| 3 | ɛ | Open-mid front unrounded | English "bed", French "mère" |
| 4 | a | Open front unrounded | Spanish "casa", Italian "la" |
| 5 | ɑ | Open back unrounded | English "father" (RP) |
| 6 | ɔ | Open-mid back rounded | British English "thought" |
| 7 | o | Close-mid back rounded | French "beau", Spanish "solo" |
| 8 | u | Close back rounded | Spanish "tú", French "tout" |
Secondary Cardinal Vowels (9–16)
Same tongue positions as primary vowels but with opposite lip rounding:
- y — Close front rounded (German "über", French "tu")
- ø — Close-mid front rounded (French "peu", German "schön")
- œ — Open-mid front rounded (French "peur", German "Köln")
- ɶ — Open front rounded (rare; found in some German dialects)
- ɒ — Open back rounded (British English "lot")
- ʌ — Open-mid back unrounded (English "strut")
- ɤ — Close-mid back unrounded (Vietnamese, Estonian)
- ɯ — Close back unrounded (Japanese /u/, Turkish, Korean)
Complete IPA Vowel Chart
| Height | Front Unrounded | Front Rounded | Central | Back Unrounded | Back Rounded |
|---|---|---|---|---|---|
| Close | i, ĩ | y, ỹ | ɨ, ʉ | ɯ | u, ũ |
| Near-close | ɪ | ʏ | ʊ | ||
| Close-mid | e, ẽ | ø, ø̃ | ɘ, ɵ | ɤ | o, õ |
| Mid | e̞ | ø̞ | ə, ə̃ | o̞ | |
| Open-mid | ɛ, ɛ̃ | œ, œ̃ | ɜ, ɞ | ʌ | ɔ, ɔ̃ |
| Near-open | æ | ɐ | |||
| Open | a, ã | ɶ | ä | ɑ, ɑ̃ | ɒ |
Note: Tilde ( ̃ ) indicates nasalization. Some vowels listed have nasal counterparts important in languages like French, Portuguese, and Polish.
English Vowel Inventory
Standard American English (General American)
| IPA | Example Word | Transcription | Description |
|---|---|---|---|
| i | fleece | /flis/ | Close front unrounded |
| ɪ | kit | /kɪt/ | Near-close front unrounded |
| e | face | /fes/ | Close-mid front (often diphthong [eɪ]) |
| ɛ | dress | /drɛs/ | Open-mid front unrounded |
| æ | trap | /træp/ | Near-open front unrounded |
| ɑ | lot, palm | /lɑt/, /pɑm/ | Open back unrounded (merged in GA) |
| ɔ | thought | /θɔt/ | Open-mid back rounded |
| o | goat | /ɡot/ | Close-mid back (often diphthong [oʊ]) |
| ʊ | foot | /fʊt/ | Near-close back rounded |
| u | goose | /ɡus/ | Close back rounded |
| ʌ | strut | /strʌt/ | Open-mid back unrounded |
| ɝ | nurse | /nɝs/ | R-colored mid central (rhotic) |
| ə | about | /əˈbaʊt/ | Mid central (schwa) |
| ɚ | letter | /ˈlɛtɚ/ | R-colored schwa (rhotic) |
British English (Received Pronunciation)
Key differences from General American:
- ɒ vs. ɑ — RP maintains lot-palm split: "lot" /lɒt/ vs. "palm" /pɑːm/
- Non-rhotic: No /ɹ/ after vowels; "nurse" is /nɜːs/ not /nɝs/
- Length distinctions: More consistent vowel length differences (ː marker)
Vowels in World Languages
Three-Vowel Systems (Minimal)
Example: Classical Arabic
- /i/ — Close front
- /a/ — Open central
- /u/ — Close back
This triangular system represents the three corner vowels with maximum acoustic distinctiveness.
Five-Vowel Systems (Very Common)
Example: Spanish, Japanese, Swahili
- /i/ — Close front unrounded
- /e/ — Close-mid front unrounded
- /a/ — Open central unrounded
- /o/ — Close-mid back rounded
- /u/ — Close back rounded
Front Rounded Vowels
French: /y ø œ/ in "tu" /ty/, "peu" /pø/, "peur" /pœʁ/
German: /y ø œ/ in "über" /ˈyːbɐ/, "schön" /ʃøːn/, "Köln" /kœln/
Turkish: /y ø/ in "üzüm" /yˈzym/ (grape)
Nasal Vowels
French: /ɛ̃ œ̃ ɔ̃ ɑ̃/ in "vin" /vɛ̃/, "un" /œ̃/, "bon" /bɔ̃/, "blanc" /blɑ̃/
Portuguese: Five oral + five nasal vowel pairs
Polish: /ɛ̃ ɔ̃/ written ⟨ę, ą⟩
Complex Vowel Systems
Danish: 25+ vowel phonemes including front rounded and length/quality distinctions
English: 14–20 vowel phonemes depending on dialect
German: 16 vowel phonemes (8 short, 8 long pairs)
Diphthongs and Triphthongs
What Are Diphthongs?
Diphthongs are vowel sounds that glide from one quality to another within a single syllable. They're transcribed with two vowel symbols.
English Diphthongs
| IPA | Example | Transcription | Movement |
|---|---|---|---|
| aɪ | price | /praɪs/ | Open front → close front |
| aʊ | mouth | /maʊθ/ | Open front → close back |
| ɔɪ | choice | /tʃɔɪs/ | Open-mid back → close front |
| eɪ | face | /feɪs/ | Close-mid front → close front |
| oʊ | goat | /ɡoʊt/ | Close-mid back → close back |
Triphthongs
Three vowel qualities in one syllable (rare in English):
- aɪə — "fire" /faɪə/ (when not reduced to /faɪɚ/)
- aʊə — "hour" /aʊə/ (British RP)
Diphthongs in Other Languages
German: /aɪ aʊ ɔɪ/ in "mein" /maɪn/, "Haus" /haʊs/, "Häuser" /ˈhɔɪzɐ/
Italian: Has rising diphthongs like /je/ in "pieno" /ˈpjɛno/
Mandarin: Extensive diphthong system including /ai au ei ou/
The Schwa (ə) — Most Common Vowel
The schwa /ə/ is the most frequently occurring vowel sound in English and many other languages. It's a mid-central vowel produced with minimal tongue/lip effort.
Characteristics
- Always unstressed in English
- Neutral position: Tongue relaxed in center of mouth
- Reduced vowel: Result of vowel reduction in unstressed syllables
English Schwa Examples
- about — /əˈbaʊt/ (first syllable)
- sofa — /ˈsoʊfə/ (second syllable)
- pencil — /ˈpɛnsəl/ (second syllable)
- camera — /ˈkæmərə/ (both unstressed syllables)
R-Colored Schwa (ɚ)
In rhotic English dialects (American, Canadian, Irish):
- father — /ˈfɑðɚ/
- butter — /ˈbʌtɚ/
- never — /ˈnɛvɚ/
Vowel Features and Modifications
Length
- ː — Long: Finnish "tuli" /tuli/ (fire) vs. "tuuli" /tuːli/ (wind)
- ˑ — Half-long: Estonian distinctions
- ̆ — Extra-short
Nasalization
- ◌̃ — Nasalized: French "bon" /bɔ̃/, Portuguese "mão" /mɐ̃w̃/
Rhoticity
- ɚ — R-colored schwa (American English "father")
- ɝ — R-colored mid-central (American English "bird")
Tone (on vowels)
- á — High tone (Mandarin mā má mǎ mà)
- à — Low tone
- ā — Mid tone
- ǎ — Rising tone
- â — Falling tone
Learning IPA Vowels
Practice Strategies
- Start with your native language: Identify vowels you already produce
- Use audio resources: IPA charts with recordings from phonetics labs
- Practice minimal pairs: "bit" /bɪt/ vs. "beat" /bit/
- Learn cardinal vowels: Master the reference points first
- Record yourself: Compare your production to native speakers
Common Confusions
- /i/ vs. /ɪ/: "sheep" vs. "ship"
- /e/ vs. /ɛ/: Spanish "peso" vs. English "pet"
- /ɑ/ vs. /ɔ/: "cot" vs. "caught" (merged in some dialects)
- /u/ vs. /ʊ/: "pool" vs. "pull"
Resources
- Interactive IPA Chart: internationalphoneticassociation.org
- UCLA Phonetics Lab Archive: Vowel recordings from 200+ languages
- English IPA Practice: Cambridge Dictionary, Oxford Learner's Dictionary