"Characteristics of Sound" Sound Phenomenon PPT (Class Assignment)

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"Characteristics of Sound" Sound Phenomenon PPT (Class Assignment)

Part One: Consolidation of Standards

1. Multiple choice questions

1．2016·Nanjing Among the following operations, the pitch cannot be changed ()

A． Picture A: Change the amount of water in the cup and rub the mouth of the cup again with wet hands

B. Picture B: Change the force and hit the drum head again

C. Picture C: Change the length of the steel ruler extending out of the table, and move the steel ruler again

D. Tuding: Change the amount of water in the tube and blow into the mouth of the test tube again

2. In order to explore the relationship between the loudness and amplitude of sound, Xiao Ming designed several experiments as shown in Figure 6-K-2. What do you think can accomplish the purpose of this inquiry ()

3．2017·Weihai Speaking "softly" in public places is a sign of civility. Only by answering questions "loudly" in class can teachers and classmates hear clearly. "Quietly" and "loudly" here refer to the () of the sound

A． Tone b. loudness

C. timbre D. speed of sound

4. 2017·Jinan On the evening of June 30, 2016, "New Year Eternal" - the 95th anniversary concert of the founding of the Communist Party of China was held in the Great Hall of the People in Beijing. At the concert, the baritone sang solo and the soprano sang softly. The following is about the two people. In the description of the sound, the correct one is ()

A． A baritone has a lower pitch and louder voice than a soprano

B. A baritone has a lower pitch and less loudness than a soprano

C. Baritone is higher pitched and louder than soprano

D. A baritone has a higher pitch and less loudness than a soprano

5. The sound of each person's heartbeat is unique. Scientists propose that different people can be distinguished based on this, mainly by using sound ()

A． Loudness b. Tone c. timbre D. amplitude

6. Xiao Ming learned from the "Animal World" program that elephants can emit infrasound waves to notify their companions in the distance. The next day when he went to the zoo, he heard the elephant's loud cry. Comparing the infrasound waves emitted by elephants with the calls of elephants that Xiao Ming heard at the zoo, which of the following statements is correct ()

A． The former is not caused by the vibration of an object

B. The spread of the former does not require a medium

C. The former has a lower frequency than the latter

D. The former spreads faster in the air than the latter

2. Fill in the blanks

7. There are many ways to summarize knowledge, and the mind map shown in Figure 6-K-3 is one of them. Please fill in the corresponding content: ①___________; ②__________.

8. Some people describe singer Li Jian's voice as clear and highly recognizable. This means that the ________ of Li Jian's voice is relatively unique. When Li Jian plays and sings, he constantly moves his fingers to press different positions on the guitar strings in order to change the sound of the guitar. of________.

9. A good audio equipment should not only play the role of "amplification", but also should have high "fidelity". Acoustically speaking, "amplification" is to make the ________ of the sound louder, and higher "fidelity" requires better preservation of the ________ of the original sound. (Please fill in "Loudness", "Tone" or "Tone Color")

10. Xiaohong made a wind chime with some iron pipes of the same thickness and different lengths, as shown in Figure 6-K-4. When the wind blows, these iron pipes hit each other and make a crisp sound.

(1)___________The iron pipe produces the highest pitch.

(2) This experiment shows that the frequency of object vibration may be related to __________________.

11． Figure 6-K-5 shows the waveform diagrams of several sound waves displayed by the same oscilloscope. Among them, the pitch that is different from A is ______, the loudness that is different from A is ______, and the timbre that is different from A is ______.

12. As shown in Figure 6-K-6, the same glass bottle contains different amounts of water.

(1) When you blow with your mouth against the mouth of the bottle, if you can blow out the four scales of "do(1)", "ruai(2)", "mi(3)" and "fa(4)", please follow the order Write the arrangement of the bottles corresponding to these four scales: ______________, at which time _________ is vibrating.

(2) When you tap a glass bottle with a metal spoon, you hear high and low pitches. The highest pitch is ________.

3. Experimental research questions

13. As shown in Figure 6-K-7, press one end of the plastic scale tightly on the table, and extend the other end from the edge of the table. Turn the scale to vibrate and listen to the sound made by the scale.

(1) During the experiment, if the length of the scale extending from the edge of the table is kept constant and the scale is moved with different forces, the purpose of this is to explore the relationship between _______ and _______.

(2) During the experiment, if the length of the scale extending from the edge of the table is changed and the scale is moved with the same force, the purpose of this is to explore the relationship between ________ and ________.

(3) Use a steel ruler to do this experiment. The length of the steel ruler extending from the edge of the table is the same as that of the plastic ruler, and the force used to move the ruler remains the same. Then the main difference in the sound heard is ________ (optional "loudness" and "pitch" ” or “timbre”) are different.

(4) The physical methods implicit in the experimental design are the comparison method and the ______________ method.

Characteristics of sound PPT, part 2: innovation and improvement

15. (1) Xiao Ming discovered during guitar playing that the tone emitted by the strings is related to the length, thickness and tension of the strings. So he wanted to use a string meter to do research, as shown in Figure 6-K-8, in which the tensions of the four strings a, b, c, and d are the same.

① If he chooses two strings b and d to conduct an experiment, he is exploring the relationship between pitch and string ________.

② If he wants to study the relationship between pitch and string thickness, he should choose two strings, ________ and ________, for the experiment.

③After research, Xiao Ming came to the conclusion: under the same conditions, the longer the string, the lower the pitch; the thicker the string, the lower the pitch.

(2) Please judge according to Figure 6-K-9. When the material and tension are the same, if you press and hold point A, point B, and point C respectively and then pluck the strings, the highest pitch of the sound will be produced by pressing _ __________ points, the lowest is to hold down __________ points.

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Update Time: 2024-11-22

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