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What's the difference between /z/ and /dz/?

 

They sound the same to my ears.
An example of /dz/ is the last consonant in the word "needs".

For learning: English
Base language: English
Category: Language

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    "Needs" = /dz/

    "Knees" = /z/

    I can't really help you much if you can't hear the difference, of course. But in terms of sound production, /d/ is a voiced stop-plosive and /z/ is a voiced fricative. To be able to pronounce the two sounds at once, you place your tongue on the front of your mouth, directly behind your teeth (it's called the hard palate), and then after you've pronounced the /d/ sound, you pull your tongue down a bit so that it touches both sides of your teeth, and you push air in a buzzing manner while still creating sound with your throat.

    The difference you should be hearing is a very soft, yet distinct, hard break in the sound, followed immediately after by the buzz. Without the /d/, you'd simply hear a buzz. And it's important to be able to distinguish them, due to words like "knees" and "needs"! Get sound files of a couple of other similar word pairs (like "finds/fines" or "roads/rose") and keep playing them until you can develop your ear to hear the difference.

     

    They are definitely different. Just think of "dz" as "z" with a quick "d" sound before the "z." I know this is a rather silly and self-evident explanation considering that the phonetic symbols are respectively dz and z... Think of the tip of your tongue hitting the bottom of your two front teeth before sliding into pronouncing the "z" for "needs." On the other hand, the tip of our tongue stays at the bottom of your mouth when you say the "z" sound. Let's put it this way: If you don't pronounce "needs" as "ni:dz", but rather as "ni:z", you will end up with "knees."

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