The three-way split: air and tension

English sorts consonants by whether your vocal folds are buzzing. Korean does not care much about that. Korean sorts them by how much air comes out and how tight your throat is. Once you stop listening for a buzz and start feeling for air and tension, this whole system opens up.

Five of the consonants you already know have two relatives each. Within a row, the tongue or lips are in an identical position. Nothing about the place of articulation changes. Only the throat and the air.

Get the paper strip

Cut a strip of paper about as wide as two fingers and hold it lightly in front of your lips, close enough that a breath moves it. This is not a gimmick — the three-way distinction is a distinction in airflow, and airflow is visible.

Family	Throat	Air at the release	Paper strip
Plain ㄱ ㄷ ㅂ ㅈ ㅅ	Relaxed	A little	Twitches
Aspirated ㅋ ㅌ ㅍ ㅊ	Open and slack	A lot, in a hard puff	Jumps
Tense ㄲ ㄸ ㅃ ㅉ ㅆ	Squeezed shut, then released	Almost none	Does not move at all

Back of the tongue against the soft palate

Seal, then release gently. Throat relaxed, very little air.

가ga

Same seal. Now push a hard breath out with the release, so the air keeps rushing after the tongue drops.

카ka

Same seal, but squeeze your throat shut first and press the tongue hard. Release abruptly with no breath behind it.

까kka

• 개다gaedavs캐다kaeda

  to fold up / to dig up

• 개다gaedavs깨다kkaeda

  to fold up / to break, to wake

• 캐다kaedavs깨다kkaeda

  a hard puff / no puff at all

Tongue tip against the ridge

Light release, relaxed throat.

다da

Same tongue, hard puff after.

타ta

Same tongue, throat squeezed, sharp release, no air.

따tta

• 달dalvs탈tal

  moon / mask

• 달dalvs딸ttal

  moon / daughter

• 탈talvs딸ttal

  the paper jumps / the paper stays still

Both lips

Lips part, small amount of air.

바ba

Lips part and a strong breath follows.

파pa

Press the lips hard, squeeze the throat, pop them apart with no breath.

빠ppa

• 불bulvs풀pul

  fire / grass

• 불bulvs뿔ppul

  fire / horn

• 풀pulvs뿔ppul

  the classic test pair — one blows the paper, one does not

Tongue blade against the ridge and front palate

Block, then a short scrape. Relaxed.

자ja

Same, with a hard breath riding out on the scrape.

차cha

Same, throat squeezed, tight and abrupt.

짜jja

• 자다jadavs차다chada

  to sleep / to be cold

• 자다jadavs짜다jjada

  to sleep / to be salty

The hiss has only two members

ㅅ never stops the air, so there is nothing to release and no puff to add. It has a tense partner but no aspirated one.

A soft, slightly breathy hiss through a narrow gap.

사sa

Same gap, but the whole front of your tongue is tense and your throat is tight. Sharper, louder, and it starts instantly with no breath leaking in front of it.

싸ssa

• 살salvs쌀ssal

  flesh / uncooked rice

• 사다sadavs싸다ssada

  to buy / to be cheap

How to actually practise this

1. Pick one row — the lips row is easiest to see. Hold the paper up.
2. Say the plain one ten times, watching for a twitch. Then the aspirated one ten times, making the paper jump every single time. Exaggerate; you can tone it down later.
3. For the tense one, first practise the throat squeeze on its own: start to cough, and stop it halfway. That catch you feel is the closed throat. Hold that, build the lip closure behind it, then let go sharply.
4. Only then alternate all three. If you can make the paper behave differently three ways, your mouth already knows the distinction, even if your ear does not yet.