Precautions:
(1) You should make your hand look like you are making an "ok" gesture, and your thumb and forefinger should form a complete circle.
(2) Please note that as long as it does not affect the posture, it is not particularly important how to put the rest of the fingers.
(3) Although there are many other whistling skills, the above method is the easiest to use, and some people think that this method blows the loudest whistle. It is said that this method is used correctly, and the whistle can be higher than 130 decibels.
2. lick your lips. The tongue moves up and down to moisten the upper and lower lips. We don't need to wet the corners of our mouths to make saliva drip, but at least our lips need to be absolutely wet.
Precautions:
At this stage, your mouth should also be wide open. Keep your lips slightly close to your teeth instead of relaxing.
3. Put your tongue on the circle of "OK". Put the circle formed by thumb and forefinger in front of your mouth. Stick out your tongue and touch the place where two fingers touch.
Precautions:
Keep your tongue close to your fingers. Apply enough pressure to the tongue to make the tip of the tongue tilt slightly. Please make sure it is rolled up and never put it down.
4. Put your lips on your fingers and close them. Push your tongue into your mouth with the power of your fingers. Then, the lips wrap around the fingers and close them, leaving only a small hole between the upper lip and the circle formed by the fingers.
Precautions:
(1) Most of the lips should be under finger contact.
(2) The small hole between the finger and the lower lip is a "blowhole". Without this hole, you can't make any noise.
(3) Please ensure that the area around the air hole is sealed. Air escaping from anywhere in the front of your mouth will stop you from whistling loudly.
5. Blow the air out of your mouth. Take a deep breath through your nose, and then blow the air out of the pores formed by your fingers and lower lip. When the method is correct, you will hear a clear and loud whistle.
Precautions:
(1) If at first you don't succeed, don't be discouraged. For many people, this is a skill that takes time to practice.
(2) Usually, the more you exhale, the louder your voice will be. Pay attention to the concentration and restraint of breathing, and do not exhale forcibly, so that air will suddenly run out of your mouth.