People's Education Edition Physics for Grade 8, Volume 2
People's Education Edition Ninth Grade Physics Complete Book
Shanghai Science Edition Ninth Grade Physics
People's Education Edition Physics for Grade 8, Volume 1
Shanghai Science Edition 8th Grade Physics
Beijing Normal University eighth grade physics volume one
Lu Jiao Edition Ninth Grade Physics Volume 1
Beijing Normal University Ninth Grade Physics Volume 1
Lu Jiao Edition Ninth Grade Physics Volume 2
Guangdong and Shanghai Edition Ninth Grade Physics Volume 1
Lu Ke Edition High School Physics Compulsory Course One
People's Education Press High School Physics Compulsory Course II
Guangdong and Shanghai version of eighth grade physics volume 2
Beijing Normal University Ninth Grade Physics Volume 2
Lu Jiao Edition Eighth Grade Physics Volume 2
Guangdong and Shanghai Edition Ninth Grade Physics Volume 2
!["Characteristics of Sound" Sound Phenomenon PPT Courseware 11](http://daogebangong.oss-cn-beijing.aliyuncs.com/ppt/preview/1/712823b0-c58d-452d-8353-477242e9d4c0.webp)
Category | Format | Size |
---|---|---|
Lu Jiao edition eighth grade physics volume 1 | pptx | 6 MB |
Description
"Characteristics of Sound" Sound Phenomenon PPT Courseware 11
learning target
1. I want to know what pitch and loudness are and be able to distinguish between them. Through exploration, I can understand the relationship between pitch and frequency, and the relationship between loudness and vibration radiation. I will initially use the controlled variable method to design experiments and experience the process of scientific inquiry.
2. I want to briefly understand the relevant knowledge of frequency, ultrasonic waves, and infrasound waves.
3. I can know the different timbres produced by different sound emitters, and feel the magic and harmony of the sound world.
Research activity one
Ask the question: What factors are related to the pitch of the sound?
My guess is that the pitch of the sound may be related to the speed of the vibration
Experimental program
1. Experimental steps:
①Press the steel ruler ___ on the table so that one end protrudes from the edge of the table. (Pay attention to where you hold your hand)
② Turn the steel ruler to make it vibrate and make sound.
③Change the steel ruler to __________ and turn the steel ruler again.
2. Compare the _____ of the steel ruler’s vibration and ____ of the sound in the two situations.
3. Pay attention to ____________________ during operation (control variable method)
Collaborate to explore the relationship between the pitch of sound and the speed of vibration.
Conclusion The faster the sound generator vibrates, the higher the pitch of the sound.
[Autonomous learning]
1. In physics, ____________ is called frequency, which is used to describe the _____ of the vibration of an object. Unit ____, abbreviated as ___, symbol ___.
2. The human vocal frequency is approximately __________, and the hearing frequency range is __________.
3.____________ is called ultrasonic wave; ____________ is called infrasound wave.
4. On the eve of an earthquake, dogs often bark frequently, but people don’t feel anything. This abnormal phenomenon shows that ( )
A. Dogs can emit infrasound waves with the same frequency as seismic waves
B. The hearing range of dogs’ ears is wider than that of humans, and they can hear infrasound waves that human ears cannot hear.
C. Human ears cannot hear seismic waves because they are ultrasonic waves.
D. Seismic waves cannot be felt by human ears because no infrasound waves are generated.
[Tracking Exercise 1]
1. To make the sound produced by the erhu higher in pitch, the method that should be adopted is ( )
A. Pull the string tighter B. Relax the string
C. Increase the length of the sounding part D. Play the piano with greater force
2. The "B-ultrasound" machine uses ultrasound waves to diagnose conditions, but people cannot hear the sound it makes. This is because ( )
A. The sound is too loud b. volume is too low
C. The frequency of sound is greater than the frequency that humans can hear the sound
D. The frequency of sound is smaller than the frequency that humans can hear
Research activity two
Ask a question: What factors are related to the loudness of sound?
My guess is that the loudness of the sound may be related to the amplitude of the sound emitter
Experimental program
1. Experimental steps:
① Use a small hammer to hit the tuning fork to make it vibrate, listen to the sound made by the tuning fork, and observe the extent of the bounce of the ball.
② Use a small hammer to hit the tuning fork to make it vibrate, listen to the sound made by the tuning fork, and observe the extent of the bounce of the ball.
2. Compare the _____ of the ball being bounced twice and the ____ of the sound.
3. Pay attention to the problem: Use ____ tuning fork to only change the amplitude of the sound emitter (control variable method).
Collaborate to explore the relationship between the loudness of sound and the amplitude of the sound emitter.
Conclusion: The greater the amplitude of the sound emitter, the louder the sound.
[Tracking Exercise 2]
1. The sound of thunder "deafening" refers to the ______ loudness of the sound.
2. When people speak loudly to a distance, they often use their hands to form a trumpet shape around their mouth. This is for ( )
A. Increase speaking frequency
B. Increase the loudness of the sound reaching the other party’s ears
C. Change the timbre of speech
D. Increase the speaker’s lung capacity and make it easier for the person to speak
[Tracking Exercise Three]
Xiao Shenyang imitated the voice of singer Daolang in the 2009 Spring Festival Gala sketch "Not Short of Money", and the audience felt very similar. From a physical point of view, Xiao Shenyang mainly imitated Daolang's singing voice ( )
A. Speed of sound b. Tone c. Loudness D. timbre
Test in class
1. "The tenor is singing loudly", the two words "gao" in this sentence, the first refers to _____ high, and the second refers to ______ big.
2. The voiceprint lock is a magical lock. As long as the owner speaks a preset code word, the lock can be opened. Others cannot open the lock even if they speak the code word. The main basis for this voiceprint lock to identify sounds is ( )
A. Pitch B. Loudness C. Timbre D. Speed of sound
Keywords: Acoustic phenomena teaching courseware, Sound characteristics teaching courseware, Lujiao version eighth grade physics PPT courseware download, eighth grade physics slide courseware download, Acoustic phenomena PPT courseware download, Sound characteristics PPT courseware download, .PPT format;
For more information about the "Acoustic Phenomenon Characteristics of Sound" PPT courseware, please click the "Acoustic Phenomenon ppt Characteristics of Sound ppt" tag.
"Characteristics of Sound" Sound Phenomenon PPT Courseware 10:
"Characteristics of Sound" Acoustic Phenomenon PPT Courseware 10 Teaching Objectives 1. Understand the characteristics of sound 2. Know that pitch is related to the frequency of the sound emitter, and loudness is related to the amplitude of the sound emitter 3. Pay attention to the rigor of scientific terminology 4. Different sound emitters emit The timbre of the music is different from the same pitch...
"Characteristics of Sound" Sound Phenomenon PPT Courseware 9:
"Characteristics of Sound" Acoustic Phenomenon PPT Courseware 9 Learning Objectives 1. Understand the characteristics of sound; 2. Know that the pitch of sound is related to the frequency of the sound emitter; 3. Know that the loudness of sound is related to the amplitude of the sound emitter; 4. Know the different sounds The timbre of the sound produced by the body is different. Know...
"Characteristics of Sound" Sound Phenomenon PPT Courseware 8:
"Characteristics of Sound" Sound Phenomenon PPT Courseware 8 The first link: Create situations and introduce new lessons Do the sounds you hear are the same? What other different languages and words do you know to describe sounds in your life? The second link: Teacher-student interaction, exploring new knowledge 1. Pitch demonstration experiment..
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Update Time: 2024-09-06
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