English /f/ vs /v/
fan vs van: same teeth, different throat

/f/ and /v/ are identical sounds in terms of articulation -- upper teeth on lower lip, air flowing through the gap. The only difference is voicing: /f/ is produced with silent vocal cords; /v/ has the vocal cords switched on and buzzing. Touch your throat and say /ffff/ -- silence. Say /vvvv/ -- you feel the buzz. That single switch separates "fan" from "van," "ferry" from "very," and "leaf" from "leave."

The ABX drill plays two reference sounds then a mystery sound X. Choose which one X matches. Five rounds to train the voicing distinction.

🔇Voicing only differs
👄Same articulation
🦷Both labiodental
🌎Spanish /b/ vs /v/ confusion
Can you hear the difference?
How it works: You'll hear sound A, sound B, then a mystery sound X. Choose whether X matches A or B. Words are revealed after you answer.
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Listen carefully...

Mystery sound

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The problem

Why /f/ and /v/ cause errors across many language backgrounds

The /f/-/v/ contrast is a voicing pair: two sounds identical in every way except whether the vocal cords are active. Many languages handle voicing contrasts differently from English -- either using fewer of them, restricting them to certain positions, or neutralizing them at word edges. English uses voicing contrastively in many positions including word-final, which many languages do not.

Spanish is a clear example: the Spanish letter "v" represents /b/ (a voiced bilabial stop or fricative), not the labiodental /v/. Spanish speakers in English produce "berry" for "very" and "ban" for "van" -- substituting /b/ for /v/. But they may also struggle with the /f/-/v/ contrast itself when both are presented.

In word-final position, English voicing contrasts are particularly important: "leaf" vs "leave," "safe" vs "save," "belief" vs "believe." Final devoicing -- a rule in German, Dutch, Russian, and other languages -- would eliminate these distinctions entirely.

What happens without training
  • ✗ "Fan" and "van" sound identical
  • ✗ "Ferry" sounds like "very" (Spanish speaker)
  • ✗ "Leaf" and "leave" are indistinguishable at word end
  • ✗ "Fine" and "vine" collapse together
What changes with ear training
  • ✓ /f/ and /v/ become separate categories
  • ✓ You catch the buzzing quality of /v/
  • ✓ Word-final pairs like leaf/leave become clear
  • ✓ Production of /v/ in common words improves
Spanish speakers

Spanish lacks the labiodental /v/ phoneme. The letter "v" in Spanish represents the same phoneme as "b" -- typically /b/ word-initially and a bilabial fricative /β/ between vowels. Spanish speakers often substitute /b/ for English /v/, making "van" sound like "ban" and "very" like "berry." The /f/-/v/ distinction is entirely absent from native Spanish phonology.

German / Dutch speakers

German and Dutch have both /f/ and /v/ phonemes, but German applies final devoicing: voiced consonants at word ends become voiceless. A German speaker may produce "leaf" and "leave" identically (both as /f/) without training. This affects all word-final voicing contrasts, not just /f/-/v/.

Japanese / Korean speakers

Japanese has /f/ only before /u/ (as in "Fuji") and lacks /v/ as a native phoneme -- loanwords use /b/ for /v/. Korean similarly lacks /v/ and uses /b/ as a substitute. Both groups often produce /b/ for /v/ and may confuse /f/ and /b/ or /f/ and /v/ in perception.

Production guide

How to produce /f/ and /v/

/f/f -- fan, ferry, leaf, safe
  1. 1. Gently rest your upper front teeth on your lower lip.
  2. 2. Blow air through the narrow gap between teeth and lip.
  3. 3. Do NOT vibrate your vocal cords -- keep the throat silent.
  4. 4. The result is a sharp hissing sound with no throat buzz.
Anchor words: fan, ferry, fine, fail, leaf, safe, off, stuff, rough, after
/v/v -- van, very, leave, save
  1. 1. Same position: upper front teeth on lower lip.
  2. 2. Same airflow through the narrow gap.
  3. 3. ADD vocal cord vibration -- turn on the throat buzz.
  4. 4. You should feel buzzing in your lower lip where the teeth press.
Anchor words: van, very, vine, veil, leave, save, love, give, have, live
The throat test

Place one hand on your throat. Say a long "fffff" -- your throat should feel completely still. Now say a long "vvvvv" -- you should feel clear vibration buzzing through your hand. Practice switching between them rapidly: "ffffvvvvffffvvvv" while keeping the teeth-to-lip position constant. Only the voicing changes. This is the most reliable tactile check for the distinction.

The word-final challenge

The hardest position for the /f/-/v/ contrast is word-final: "leaf" vs "leave," "safe" vs "save," "proof" vs "prove." English speakers often reduce final voicing, making /v/ at word ends sound almost like /f/. The main acoustic cue is vowel length: the vowel before /v/ is longer than before /f/. "Leaf" has a shorter vowel than "leave." Listen for that vowel duration difference.

Click to hear

Minimal pairs: tap each word to hear it

English word pairs where the only difference is /f/ vs /v/. Click each word to compare.

/f/ voiceless
/v/ voiced
a cooling device
↔
a large vehicle
a boat crossing service
↔
to a high degree
of good quality; a penalty
↔
a climbing plant
to not succeed
↔
a face covering
a plant structure
↔
to depart
More /f/ words
fanferryfinefailleafsafeoffstuffroughafterofferphonefeelfood
More /v/ words
vanveryvineveilleavesavelovegivehavelivevoicevaluevisitarrive
Common questions

Frequently asked

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/f/ vs /v/ is just one English contrast

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