"Hazards and Control of Noise" Acoustic Phenomenon PPT Courseware 2

Description

"Hazards and Control of Noise" Acoustic Phenomenon PPT Courseware 2

teaching objectives:

1. Understand noise and its sources.

2. Know the dangers of noise and ways to control it.

3. Through experience and observation, understand the ideas of noise control and develop the ability to apply physics knowledge to solve practical problems.

4. Enhance awareness of environmental protection through learning.

Teaching focus: ways to reduce noise

Teaching Difficulty: Noise Level

2. Self-study

Contents on pages 42-44 of the self-study textbook and complete the self-study outline.

1. Read the first part of the textbook and summarize the concept of noise from the perspective of physics and environmental protection.

(1) From a physical point of view, the sound emitted by the sound emitting body is called noise.

(2) From the perspective of the protection of the Ministry of Environment, all sounds that are _______________________ and sounds that are _______________________ to people are noise.

(3) List as many common noises in life as possible.

3. Research

1. Read the first part of the textbook and summarize the concept of noise from the perspective of physics and environmental protection.

(1) From a physical point of view, the sound emitted by the sound emitting body is called noise.

(2) From the perspective of the protection of the Ministry of Environment, all sounds that are __________________ and sounds that are __________________ to people are noises.

(3) What are the common noises in life?

2. Read the second part of the textbook carefully and complete the following questions by comparing the tables in the small information.

(1) Remember that the noise level unit is _______. In order to protect hearing, the sound should not exceed _____dB; in order to protect our work and study, the sound should not exceed _______dB; in order to ensure rest and sleep, the sound should not exceed _____dB.

(2) Give examples of the harm that noise does to people. (Think on your own first, then discuss and present in the group)

What are the dangers of noise?

1. Can cause tinnitus, earache and damage hearing.

2. It makes people upset and reduces work efficiency.

3. Damage the cardiovascular system and cause high blood pressure and heart disease.

4. It can cause nervous system dysfunction, headache, dizziness, insomnia, memory loss, and moodiness.

5. Interfering with rest and sleep.

6. Damage vision.

Four reflections

1. What did you gain from this class?

1. Sources and classification of noise

Definition from a physical perspective

Environmental protection perspective definition

2. Noise intensity levels and hazards

3. Control noise

prevent noise

block sound transmission

Prevent noise from entering your ears

2. How has learning this lesson inspired your past behavior? What will you do in the future?

3. Compliance test: Complete the test questions in the self-study syllabus.

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Update Time: 2024-09-07

This template belongs to Physics courseware People's Education Edition Physics for Grade 8, Volume 1 industry PPT template

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