Category	Format	Size
Hunan Education Edition Fourth Grade Science Volume 1	pptx	6 MB

"Control Sound" Sound PPT Courseware

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Upload Time: 2024-09-30

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Description

"Control Sound" Sound PPT Courseware

Discussion and communication: Under what circumstances should we make our voices louder?

How did you feel after hearing the sound just now?

The first sound sounds pleasant and comfortable, and we call it musical sound.

The second type of sound is noisy, harsh, uncomfortable, and annoying. We call this type of sound noise.

What harm does noise do to us physically and psychologically?

1. Can cause hearing loss.

2. It is harmful to the human cardiovascular system and can easily induce hypertension.

3. Affects the human nervous system.

4. Affect sleep and cause fatigue.

Talk about it

How can we control the sound of objects and reduce noise in our lives? For example, in hospitals, libraries, classrooms...

soundproofing competition

1. The team develops a sound insulation plan. (What materials are used and how are they assembled?)

2. Group experiment, display and introduce the group design plan.

Ways to protect your hearing:

1. Avoid all kinds of noise.

2. Prevent ear canal infections.

3. Avoid the influence of high air pressure around the ears.

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For more information about the "Voice Controlling Sound" PPT courseware, please click on the Sound ppt Controlling Sound ppt tag.

File Info

Update Time: 2024-09-30

This template belongs to science courseware Hunan Education Edition Fourth Grade Science Volume 1 industry PPT template

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"Control Sound" Sound PPT Courseware