Write three ways to make plastic bags speak?

Pull with both hands, rub hard, slap, and blow on the side of your mouth.

When you shoot a plastic bag, the pressure of the gas inside the bag is higher than the outside atmospheric pressure due to the strong squeezing of the plastic bag.

When the strength of the plastic bag is lower than the pressure difference between the air pressure and the atmospheric pressure inside the bag, multiply the surface area.

That is, the pressure generated by the air pressure breaks through the plastic bag.

Because the average strength of the plastic bag can not be exactly the same, the rupture position is at the critical point of the lowest strength of the plastic, in slow motion you carefully observe, you will find that the rupture slowly becomes larger from a small opening, at this time, due to the pressure difference, the air flow from the rupture to the outside world at a high speed, resulting in serious friction between the outside gas and the gas in the plastic bag, and the gas vibrates and makes a sound.

Plastic properties. Most of the commonly used food plastic bags are made of polyethylene film, which is non-toxic, so it can be used to hold food. There is also a film made of polyvinyl chloride, and polyvinyl chloride itself is not toxic, but the additives added according to the use of the film are often harmful substances to the human body, which has a certain toxicity.

Therefore, this kind of film and plastic bags made of this film are not suitable for holding food. To identify polyvinyl chloride plastics.

bags and polyethylene plastic.

The bag can be identified using the following simple method.

Pull with both hands, rub hard, slap, and blow on the side of your mouth.

Shake it hard. All of these methods can make the plastic bag make a sound.

Wash it and reuse.

Add plastic bags to resist the workmanship into plastic buckets.

Put the small bag in the shoes and seal it with a plastic bag, the deodorization and dehumidification effect will be better.

Making it into a kite can cultivate Sun San's hands-on ability.

It can also be made into decorations.

Make mats, make garbage bags, and send them to the factory for reprocessing.

Wash it and reuse. Plastic bags can be processed into plastic buckets; Put the bag in the shoes and seal it with a plastic bag, the deodorization and dehumidification effect will be better; Make it into a kite to develop children's hands-on ability; It can also be made into decorations.

Your advice is to talk more and sing more.

If you want to develop your profession, you should ask a professional vocal teacher to teach you. The field professor will be much clearer. Now provide a little way for you to try.

First of all, the sound is spit out by the dantian, where is the dantian? In the abdomen, below the navel, if a girl is about the same position in the uterus. The inhale is there, and the exhale is exhaled from there.

During this process, the airflow passes through the mouth and nose, through the throat and trachea to the lungs, that is, the chest cavity, but don't worry, you should slowly inhale down the stomach and then inhale to gather it. The one who gathers the qi is the dantian.

Ordinary people make sounds through the mouth and throat, and the better ones are the ribcage, but the announcers and singers are definitely dantian voices.

Secondly, when vocalizing, the posterior cavity should be opened. Where is the back chamber? How do I open it? There is a way to open the mouth, put the hand next to the ear, and touch the junction of the bone with the hand will sink into a small pit, which is to open the posterior cavity. This way the throat will not hurt easily.

Finally, to have a good sound, you need to constantly and correctly breathe and make sounds by yourself, and then figure out which part of the mouth sounds best.

The easiest way: go to a class to teach vocal music, no need to be advanced, just be able to sing bel canto, learn for a few months, and then no one will have to teach you, you will use dantian pronunciation, and the resonance cavity will be very good.

Poly bags for food have no sound.

This seems unlikely.

Singing skills: 2 tricks to change the throat vocalization, teach you to make a scientific voice.

Inhale, breathe in the dantian, and try not to be too nasal.

Popular singing, bel canto singing, national singing.

Popular singing (also known as popular singing) began in China in the 30s of the twentieth century and was widely spread. It is characterized by a natural voice, similar to speech, with true voices in the middle voice area and false voices in the high voice area. Resonance is rarely used, so the volume is low.

When singing, it must use an electroacoustic amplifier, and the performance form is mainly solo, often accompanied by dance movements, the pursuit of natural and sweet voice, and the feelings are delicate and real.

Bel canto is a style of singing that originated in Italy in the 17th century. With beautiful timbre and rich in variety; The division of voices is strict, and the harmony and unity of the sound area are emphasized; The vocal method is scientific, and the volume is plastic; The air sound is consistent, and the connection between the sound is smooth and even. This style of singing has had a great influence on the world.

The current bel canto singing style is based on traditional European vocal techniques, especially Italian vocal techniques. Under the influence of the Renaissance ideology, opera was gradually produced, and bel canto singing was gradually improved. Perrigan wrote the first Italian opera, Daphne, and in 1600 he wrote the opera Julidici.

The composer's creation has made the opera break through the previous singing method.

Ethnic singing is a kind of singing art created and developed by the people of all ethnic groups in China according to their own habits and hobbies. Folk singing includes four types of singing: Chinese opera singing, rap singing, folk song singing and new national singing. Because the national singing method is produced among the people, it has inherited the excellent tradition of national vocal music, and it is diverse in singing forms, and the singing style has distinctive national characteristics, vivid language, and simple feelings.

Therefore, it has taken deep root among the masses and has become indispensable spiritual food for the people.