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Qingdao Edition Fifth Grade Science Volume 1	pptx	6 MB

"The Harm and Prevention of Noise" PPT

Author: ︶￣Ｓs°╮

Upload Time: 2024-09-08

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Description

"The Harm and Prevention of Noise" PPT

Part One: Content Import

1. Noise

In physics, the sound produced when a sound-emitting body vibrates irregularly is called noise.

From the perspective of environmental protection, any sound that hinders people's normal rest, study and work, as well as any sound that interferes with the sounds people want to listen to, is noise.

2. Source of noise

traffic noise

industrial noise

construction noise

social life noise

3. Noise intensity level

Urban environmental sound intensity and standards in my country

Part Two: Controlling Noise

The three stages of sound from production to hearing

vibration of sound source

prevent noise

Propagation through air and other media

Block the spread of noise

Received by the human ear (vibrations of the eardrum)

Prevent noise from entering your ears

Keywords: Qingdao edition fifth grade science PPT courseware free download, noise hazards and prevention PPT download, .PPT format;

For more information about the "Hazards and Prevention of Noise" PPT courseware, please click the "Hazards and Prevention of Noise" ppt tag.

"Hazards and Prevention of Noise" PPT courseware download:

"The Hazards and Prevention of Noise" PPT Courseware Download Part One: Sources of Noise 1. Noise from a physical perspective: It is the sound emitted when the sound-emitting body vibrates irregularly. 2. Noise from an environmental protection perspective: Any noise that hinders people Work and study affect people's lives...

"Hazards and Prevention of Noise" PPT download:

"The Harm and Prevention of Noise" PPT download Part 1: Noise Do you know? What is noise? Noise is noise. It is a type of sound that causes people to be irritated or whose volume is too strong and endangers human health. From the perspective of environmental protection, anything that affects people's normal...

"Hazards and Prevention of Noise" PPT courseware:

"The Harm and Prevention of Noise" PPT courseware Explore: The sources of noise Explore: How do people control and eliminate noise pollution? Methods to prevent and control noise: 1. Control noise sources 2. Block noise transmission 3. Attenuate noise at the human ear Thinking: What are the noises around us? ..

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Update Time: 2024-09-08

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The harm and prevention of noise ppt

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"The Harm and Prevention of Noise" PPT