What is the difference of hard and soft th sound?

The difference between the "hard" and "soft" th sounds is a matter of where the tongue is placed in your mouth.

Hard th (as in "think" or "thick"):

* Tongue Position: The tip of your tongue is placed behind your front teeth, and you force air out through the small gap between your tongue and teeth.

* Sound: A voiceless sound.

Soft th (as in "this" or "that"):

* Tongue Position: The tip of your tongue is placed between your front teeth, and you force air out through the gap between your tongue and teeth.

* Sound: A voiced sound, meaning your vocal cords vibrate as you make the sound.

Here's a way to remember:

* Hard th: Think of "think" – the tongue is behind the teeth.

* Soft th: Think of "this" – the tongue is between the teeth.

It's important to note that these terms are a bit informal. Linguists would say that the hard th sound is " voiceless dental fricative" and the soft th sound is "voiced dental fricative."