"How Do We Hear Sound" Sound and Environment PPT Courseware Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
| 文件名 如何下载使用 | 下载次数 | Download Points | 下载地址 |
|---|---|---|---|
| "How Do We Hear Sound" S... | 14375次 | 0.00 | Free Download |
Tips: If you open the template and feel that it is not suitable for all your needs, you can search for related content "How Do We Hear Sound" Sound and Environment PPT Courseware is enough.
How to use the Windows system template
Directly decompress the file and use it with office or wps
How to use the Mac system template
Directly decompress the file and use it Office or wps can be used
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view: Click to see
How to create a high-quality technological sense PPT? 4 ways to share the bottom of the box
Notice
Do not download in WeChat, Zhihu, QQ, built-in browsers, please use mobile browsers to download! If you are a mobile phone user, please download it on your computer!
1. The manuscript PPT is only for study and reference, please delete it 24 hours after downloading.
2. If the resource involves your legitimate rights and interests, delete it immediately.
3. Contact information: service@daogebangong.com
"How Do We Hear Sound" Sound and Environment PPT Courseware, due to usage restrictions, it is only for personal study and reference use. For commercial use, please go to the relevant official website for authorization.
(Personal non-commercial use refers to the use of this font to complete the display of personal works, including but not limited to the design of personal papers, resumes, etc.)
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view:Please click to see
Authoritative PPT Summary
"How Do We Hear Sound" Sound and Environment PPT Courseware
teaching objectives
1. Know that sound is produced by the vibration of objects.
2. Know that sound propagates outward in the form of waves; know that the propagation of sound requires a medium, and different media propagate sound at different speeds.
3. Understand the process of hearing after sound waves enter the human ear.
4. Through observation and experiment, explore the conditions for sound generation and propagation
The course standard requirements for this chapter:
1. Through experiments, understand the conditions for the generation and propagation of sound.
2. Understand the characteristics of musical sounds.
3. Understand some applications of acoustic knowledge in modern technology
4. Know the dangers of noise and methods of control.
1. The production of sound
Sound is produced due to __________, the vibration stops and the sound production also stops.
We call _______________ ______.
Discuss
What objects can be sources of sound?
Solids, liquids and gases can all be sources of sound.
2. The essence of sound is a wave, which we call _______.
The drum vibrates to the left and thins the air on the right.
The drum vibrates to the right, compressing the air on the right; making this part of the air denser;
The drum surface vibrates left and right, forming sparse and dense sound waves in the air, which spread out from near to far.
Sound waves can make other objects vibrate
3. Sound propagation conditions
What conditions are needed for the propagation of sound?
The sounds we usually hear come through the air.
So, can liquids and solids transmit sound?
in conclusion
1. Sound can spread in: ______, _______, _______.
2. Sound ______ (fill in “can” or “cannot”) propagate in a vacuum.
3. Sound transmission needs:_______________
4. Conditions for sound generation and propagation:
①______________
②______________
Sound travels at different speeds in different materials.
Generally speaking, V solid>V liquid>V gas.
The speed of sound propagation is not only related to the sound-transmitting material, but also related to the surrounding temperature.
Speed of sound: How fast sound travels. V=S/t
The speed of sound depends on the medium. The fastest among solids (about 5000m/s among steel and iron)
Slower in liquid (about 1500m/s in water)
Slowest in air (340m/s at 15°C)
The speed of sound in air increases with temperature: for every 1°C increase, the speed increases by 0.6 m/s.
Practice in class:
Someone shouted at the mountain, and it took 2.5 seconds before he heard the echo. He was about ( ) meters away from the mountain.
An iron pipe more than 1,000 meters long is closed at both ends and filled with water in the middle. Person A knocks on the iron pipe at one end. Person B can hear ( ) sounds at the other end. He first hears ( ), then hears ( ) and finally hears from Sounds in the air.
Operation:
Classwork: pages 1, 2, 3, 4, 5, 6 on p29.
Extracurricular homework: Complete basic training and check by team leader.
Tutorial (preview): a. What are the pitches of sounds called? What is frequency? What is the relationship between frequency and pitch? Compare waveforms of different frequencies; b. What are the factors that affect the tone of stringed instruments? What is ultrasound? What is infrasound?. The team leader checks the preview status.
Keywords: Sound and environment teaching courseware, How do we hear sound teaching courseware, Guangdong and Shanghai version eighth grade physics PPT courseware download, eighth grade physics slide courseware download, Sound and environment PPT courseware download, How do we hear sound PPT courseware download, .PPT format;
For more information about the PPT courseware "Sound and Environment How Do We Hear Sound", please click the Sound and Environment ppt How Do We Hear Sound ppt tag.
"How We Hear Sound" Sound and Environment PPT Courseware 2:
"How We Hear Sound" Sound and Environment PPT Courseware 2 Learning Objectives 1. Know that sound is produced by the vibration of objects. 2. Know that sound propagates outward in the form of waves, that sound propagation requires a medium, and that sound propagates at different speeds in different media. 3...