Definition:
A plosive (also called a stop) is a consonant produced by completely blocking airflow in the vocal tract — creating a full oral closure — followed by a release that produces a brief burst of pressure. English plosives are /p, b, t, d, k, g/, organized into three pairs by place of articulation: bilabial (/p, b/), alveolar (/t, d/), and velar (/k, g/). Each pair contrasts in voicing. Plosives are the most universally cross-linguistically attested consonant class: essentially all languages have at least one.
Phases of Plosive Production
Every plosive has three distinct phases:
- Closure (hold) phase: A complete oral seal is formed at the relevant place of articulation; air pressure builds behind the closure
- Release phase: The closure is opened; the pent-up air bursts out, producing an audible brief noise
- Post-release (transition) phase: Coarticulation and aspiration (if present) follow
The “Stop” vs. “Plosive” Distinction
Stop is the functional/phonological term (referring to the stoppage of airflow); plosive is the articulatory/auditory term (referring to the explosion/burst at release). In many contexts they are synonyms. However, nasal stops also block oral airflow but release air nasally — they are stops but not plosives in the strictest sense.
English Plosives
| Voiceless | Voiced | Place |
|---|---|---|
| /p/ pin | /b/ bin | bilabial |
| /t/ tin | /d/ din | alveolar |
| /k/ kin | /g/ give | velar |
English voiceless plosives (/p, t, k/) are aspirated [p?, t?, k?] in syllable-initial position before a stressed vowel — a critical feature for L2 learners and the source of a Voice Onset Time (VOT) distinction (see Voicing). After /s/ (e.g., spin, still, skip), English voiceless stops are unaspirated.
Unreleased and Glottalized Stops
- Unreleased stops: In coda position, English plosives are often not released explicitly (e.g., cap — the /p/ closure is held but not burst). Learners may misjudge the absence of a burst as a missing sound.
- Glottalized stops: /t/ is often realized as a glottal stop [ʔ] in British English (e.g., button → [bʌʔn]). This is another connected speech feature learners must learn to recognize.
Cross-Linguistic Plosive Contrasts
Languages vary in how many plosive contrasts they maintain:
- Arabic, Hindi, Thai: Have additional plosive series (emphatics, aspirates)
- Mandarin Chinese: Has aspirated vs. unaspirated voiceless stops (no voiced plosive phonemes)
- Hawaiian: Has only /p, k/ and the glottal stop [?]
- Nguni languages (Zulu, Xhosa): Have click consonants functioning as plosives
Plosives in L2 Acquisition
For L2 learners, plosive errors are typically:
- Aspiration mis-transfer: L1 speakers of Spanish, French, or Mandarin often produce unaspirated English /p, t, k/, which sounds “voiced” to native English ears even though no actual voicing is involved
- VOT calibration: A major focus of pronunciation research — learners need to reset their VOT category boundaries
History
The articulatory description of stops (complete closure) was documented by ancient Indian phoneticians in the Ashtadhyayi and later by European phoneticians in the 19th century. The distinction between voiced and voiceless stops and their aspiration differences was clarified by Jones (1917) and Sweet (1877). The modern understanding of plosive phases (closure, burst, aspiration) was formalized by acoustic phoneticians in the 1950s–1960s.
Common Misconceptions
- “Voiced stops are always voiced” — English word-initial voiced stops like /b, d, g/ often have minimal or no actual vocal fold vibration; the perceptual voiced/voiceless distinction is primarily based on VOT
- “Stop = plosive” — Strictly, nasals are stops (they stop oral airflow) but not plosives (they don’t burst orally)
Criticisms
- The “closure + burst” model is a simplification; stop articulation is highly variable depending on position in word, speech rate, dialect, and speaker
Social Media Sentiment
Plosives are a common topic in linguistics courses and phonetics videos. The “why do aspirated stops sound different” phenomenon (comparing English pin vs. spin or English pin vs. Spanish pin) is a perennial discussion point. Last updated: 2026-04
Practical Application
- For teaching English to speakers of unaspirated-stop languages: use paper-in-front-of-mouth exercises to make aspiration visible
- For helping speakers of aspirated-stop languages (e.g., Mandarin learners): emphasize that English /b, d, g/ don’t need vocal fold vibration
Related Terms
See Also
Research
- Lisker, L., & Abramson, A. S. (1964). A cross-language study of voicing in initial stops. Word, 20(3), 384–422. — Definitive cross-linguistic study of VOT; foundational for understanding plosive voicing contrasts.
- Ladefoged, P., & Johnson, K. (2014). A Course in Phonetics (7th ed.). Wadsworth. — Comprehensive coverage of plosive phonetics and articulatory phases.
- Keating, P. A. (1984). Phonetic and phonological representation of stop consonant voicing. Language, 60(2), 286–319. — Analysis of how voicing in stops is phonetically implemented cross-linguistically.