20 years of teaching

Chapter 220 You Are More Exciting Than I Said

After the story was told, the students laughed, not because the story was funny, but because they were amused by Mr. Lin's earnest way of telling the story.

Teacher Lin, I heard this story from my mother when I was three years old. I am already in my teens this year, and you are still telling this story, you are so funny!

Lin Feifan continued: "My younger sister disagreed, and she wanted to open the door crying, saying that she wanted to see grandma and eat delicious Chinese cabbage. If you are Brother Little White Rabbit, please explain the truth to my younger sister from the perspective of physics. Let my sister know that the person outside is not grandma, but a big bad wolf."

Yo, the story is suddenly interesting.

The classroom was chattering, discussing how to explain scientific principles to the little white rabbit sister.

Lin Feifan named Zhang Xiaoxuan, the representative of the physics class, to answer this question.

The delicate and fair Zhang Xiaoxuan stood up and blinked her long eyelashes. She felt that as a representative of the physics class, she should answer this question more completely.

She looked down at the physics textbook, pondered for a while, then raised her head and said: "Sister, don't cry, I will tell you some physics knowledge. Sound has three characteristics, pitch, loudness, and timbre. The pitch reflects the height of the sound. Loudness indicates the strength of the sound, and timbre is also called timbre, which refers to the quality and characteristics of the sound. The timbre of the sound emitted by different sounding bodies is generally different. Listening to the sound to distinguish people, animals, and musical instruments is based on different timbres. It’s up to you to judge. Two different people can have the same pitch and loudness, but they can’t have the same timbre. Grandma’s voice is gentle and pleasant, like a spring water, like a trickle, but now the voice outside Strange yin and yang, vomit hoarse and mocking, it’s so ugly! It’s definitely not grandma, it’s definitely a big bad wolf! Last time you went out with your mother, I was alone at home, and it came once, because I know physics, so it You didn’t fool me. Sister, I’ll take you to Mr. Lin’s physics class next time, it’s really exciting!”

"..." Lin Feifan was stunned. He didn't expect that Li Xiaoxuan could talk so much, and he used an idiom he had never heard before...

Lin Feifan pretended to be unhappy, "Student Zhang Xiaoxuan, don't be so outstanding, okay? You have finished everything I want to say, and you are even more exciting than what I said!"

Yin Qinsong, who was sitting in the back row, took the lead in applauding...

There was thunderous applause in the classroom...

Famous teachers produce outstanding apprentices!Wang Baida couldn't help recalling the scene in his physics class, following the script, bland and boring.I am not a physics major, and I haven't figured out some knowledge myself, which is really misleading!

Lin Feifei further added that the timbre is related to the material and structure of the sound, and the materials and structures of different musical instruments are different, so the timbre is different.

The throat structure of different people is different. For example, a man's Adam's apple is very large, but a woman's Adam's apple is almost invisible, so the timbre of male and female voices is very different.

Children in the second grade of junior high school are in the stage of physical development and are in the stage of voice change. During this period, due to the growth of the larynx and vocal cords, it is accompanied by hoarseness, narrow range, fatigue in pronunciation, local congestion and edema, and increased secretions.

Therefore, students should protect their throats at this time, and must not shout loudly, and pay attention to nutrition, not partial eclipse, not picky eaters, and eat more foods rich in vitamins, protein, and calcium.

The voice of the boy in the voice-changing period is hoarse and deep, and the voice is very rough, like the "quack" of a duck, commonly known as the voice of a male duck, which is very unpleasant.

Not only are the timbres of women's and men's voices distinctly different, but their pitches are also different.

Women have higher-pitched voices than men, and children have higher-pitched voices than adults.

Girls' voices are relatively high-pitched. Three women play a scene, and girls get into a fight, which will make people very upset.

Of course, children are even more noisy, and if a classroom full of first-year students quarrels, it will drive people crazy.

If you want to change the tone of your voice, there is a way...

Lin Feifei paused...

There was silence in the classroom. I was so looking forward to it. This kind of knowledge was not in the textbooks.

Lin Feifan turned his back, faced the blackboard, and said, "Students, if I am speaking in a place where you cannot see, for example, I say that I am your teacher Lin, can you recognize that I am speaking?" ?”

"Yes!" All voices were deafening.

Diao Langlang's voice was the loudest, and he was so excited every time he took physics class.

"Let's do it again, see if you can hear it." Lin Fei moistened his throat, pulled his chin down, and lifted his smile, "The chief of staff should not be flattered, open a teahouse, hope to prosper, the first in the world. The commander often comes I often go there again, I have a heart, leaning against a big tree to enjoy the shade, this is also the Commander's Hong Fuguang, so that he can be in trouble and be prosperous..."

There was a burst of laughter in the classroom, but it immediately quieted down, everyone pricked up their ears to listen, but goose bumps appeared on their bodies.

This is Mr. Lin, this is Mrs. Ah Qing!
The girl is very sad...

Teacher Lin, I don't want you to be a woman!
Yang Kuang, who loves to listen to Peking Opera, stood up in shock...

The words are correct and the accent is round, the lingering sound is lingering, strong and tactful, this is better than the tapes I have heard!

The secret is told to everyone by imitating female vocals and singing Peking Opera. By changing the way of vocalization, the timbre of the voice can be changed.

This is how ventriloquism is done in cross talk. Performers use mouth, teeth, lips, tongue, throat, nose and other vocal organs to imitate various sounds of nature, such as birds and beasts, dogs barking and chickens crowing, wind, rain, thunder and lightning, etc. people have the feeling of being there.

If the big bad wolf learns from the master of cross talk, studies hard, listens to the voice of the little white rabbit's grandmother more, and changes the way of speaking, he can really successfully trick the little white rabbit and his sister into opening the door...

Finally, Lin Feifei added some knowledge about oscilloscopes.

An oscilloscope is an electronic measuring instrument that can convert sound signals invisible to the naked eye into visible images, making it easier for people to study the characteristics of sound.

The density of the waves is different, the pitch is different, the denser the waveform, the faster the sounding body vibrates, and the higher the pitch.

The greater the amplitude of the sounding body, the greater the loudness, and the more vertical grids the waveform occupies.

The timbre of different instruments is different, and the shape of the wave can be found to be completely different on the oscilloscope. If the timbre is not used, the shape of the wave is very different.

The knowledge about "The Characteristics of Sound" was finally finished. Lin Feifei finally made a summary and assigned homework.

Once again, just after the homework was assigned, the bell rang for the end of get out of class, as if the person ringing the bell was right next to him, seeing that Lin Feifan had finished speaking, he immediately rang the bell.

A few attendees in the back row walked out of the classroom and chatted in the corridor.

Lin Feifan asked the students to move the equipment to his room, and he walked up to Section Chief Yang, and politely asked everyone to give some opinions and point out his shortcomings in class.

Chief Yang patted Lin Feifan on the shoulder and said, "Young people have a bright future! Originally we were supposed to evaluate the class, but now Chief Yin and I have to rush to Fengliang Middle School for an inspection. How about it, in November The Education Bureau will organize a county-wide high-quality class competition, so you don’t need to participate in the township primary election, and you can directly participate in the county-level competition, and Chief Yin and I will go to listen to your class, and then we will evaluate the class.”

"Thank you, Chief Yang!" Lin Feifei felt a little pressure. He had never participated in the high-quality class competition, and he didn't understand any procedures.

Before leaving, Chief Yin privately said to Lin Feifan: "You work hard and fight for Jinghu Junior High School. Jinghu Junior High School is about to undergo a big change, and the time has come to give full play to your talents!"

Lin Feifan was a little dazed and didn't understand the meaning, but he didn't ask in detail, and Chief Yin didn't continue to explain.

……

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(End of this chapter)