Activate the consonant sounds / θ / in thumb and / ð / in feather. In this Pronunciation Activation Pack we will be looking at the consonant sounds / θ / and / ð /. We will look at the letter combinations that give the / θ / and / ð / sounds. We will look at lots of words which have the / θ / and / ð / sounds in them. Finally, we will activate your ability to hear and produce the / θ / and / ð / sounds correctly. The / θ / and / ð /sounds are dental fricatives made by disrupting the air flow through a narrow channel formed by the tip of the tongue and the top front teeth to cause turbulence. The / θ / sound on the chart is shown in blue, which means it is unvoiced, while the / ð / sound is shown in green, which means that it is voiced. Letter Combinations for / θ / This unvoiced dental fricative only ever has this letter combination: TH. Not all words containing the letter combination TH have the / θ / sound in them. Letter Combinations for / ð / - This voiced dental fricative has these letter combinations: TH, and THE at the end of some words. Not all words containing the letter combinations TH or THE have the / ð / sound in them.
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