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"How Sound is Produced" Sound PPT Courseware 3
experiment one:
1. One student bends the ruler first, and then the other student moves the ruler.
2. Other students observe carefully, and the team leader reports the results after the experiment.
Experiment 2:
1. One student stretches the rubber band first, and then the other student moves the rubber band.
2. Other students observe carefully, and the team leader reports the results after the experiment.
Vibration: An object (such as a drum, steel ruler, rubber band, etc.) makes repeated back-and-forth motion under the action of force. This motion is called vibration.
Experiment three:
1. Ask students to work together in pairs: one makes the drum (or ruler, rubber band) sound first, and the other immediately thinks of a way to stop it from vibrating.
2. Observe whether they can still make sound after they stop vibrating.
Knowledge expansion
Sound is produced by the vibration of an object. The vibration of the object causes the vibration of the air or other media. When this vibration is spread outward, it is sound. The human ear receives this vibration and hears sound. For example, when a person speaks, the throat drives the vocal cords to vibrate and produce sounds. The sound of the speaker is produced by the vibration of the air driven by the vibration of the paper cone. The sound of sirens and the roar of jets are caused by vibrations in the air.
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"How Sound is Produced" Sound PPT Download:
"How Sound is Produced" Sound PPT Download Part One: Introduction of New Lesson How is Sound Produced? Today we are going to make sounds. We are not only competing to see who is better at playing, but also competing to see who has gained more knowledge while playing. How do we...
"How Sound is Produced" Sound PPT:
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"How Sound is Produced" Sound PPT Courseware 5:
"How Sound is Produced" Sound PPT Courseware 5 Experiment 1: Make objects make sounds. Warm reminder: 1. Discuss how to do it before the experiment, and finish one before doing the next one. Each experiment should be repeated several times to ensure accuracy. 2. Don’t use too much force when making sounds.