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There are a few different ways to vibrate your tongue, but the one most people use is called the alveolar trill. It works by placing the tip of your tongue close to or right against your alveolar ridge, the ridge that goes behind the top gums.
Start by practicing saying the letter R in English, then say some other sounds that produce the same movement. This will help you learn where the tongue needs to be inside your mouth when you roll an R.
Experiment with placing your tongue at various points in your mouth: behind your teeth, further back, and so on. It may take some time before you find the right point to use, but it will get better as you practice and develop muscle memory for this movement.
To do this, you need to make sure that you are relaxing your tongue sufficiently, so that it is not overly tense. It should be loose and just touching the alveolar ridge. You also need to have a small gap between the ridge and your tongue, so that air can pass through it.
Next, you need to have a strong flow of air coming out of your mouth. This is important because the stronger the air, the more your tongue will vibrate. It is not as easy to make your tongue vibrate when you are trying to do this with a weaker flow of air.
It is possible to make the alveolar trill with just a little bit of air, but it is much more difficult than using a strong flow of air to vibrate your tongue. That is because the tongue can easily become tense when there is not enough air to allow it to vibrate.
You need to be able to do this exercise over and over again until your muscles are able to do it without having to use the vocal cords. It can take some time, but it will definitely pay off when you are able to roll your R’s.
The most important thing to remember here is that your tongue needs to be very relaxed in order to be able to produce the trill. If you try to make your tongue overly tense, it will prevent it from touching the alveolar ridge and will prevent your tongue from vibrating.
Another important thing to keep in mind is that your tongue should never be too tightly placed to the roof of your mouth, as this will stop it from vibrating. This is because the force of the air coming out of your mouth will push the tongue down instead of vibrating it.
If you have a hard time getting your tongue to vibrate when you use the alveolar trill, you can try experimenting with using the bilabial trill. This is a trill that is made by closing your lips lightly and blowing between them. You can try doing this with a piece of paper to see how it sounds and how easy or difficult it is to make.