S-Lab

Tune your "s" by ear and by eye.

Hiss centre

--kHz

Focus

--%

Aim for 4.5 kHz or higher. Calibrate to fit the target to your voice.

Hold a steady, bright "s" for about 3 seconds. Keep it even from start to finish.

sss

1 of 6

Record
Watch the dial while you speak.
How to make a clean "s"
  1. Teeth close together but not touching. Bite gently, with a slight smile.
  2. Tongue tip up, nearly touching the ridge just behind your top front teeth, without touching it.
  3. Let the sides of your tongue lightly touch your upper back teeth to seal them.
  4. Send the air straight down the middle onto your front teeth. You should feel it only at the centre.
  5. Stuck? Start from "t" (t-t-tsss, like the end of "cats") or from "eeee" and add air.
  6. If you feel air at the sides, keep the tongue sides on your back teeth and say "t" then "s".

The dial reads the colour of your hiss, not your tongue. How the scoring works