"Listening to Sounds" sound PPT courseware

Description

"Listening to Sounds" sound PPT courseware

Listen and learn

Guess what these sounds are?

Liquids, gases and solids can all make sound.

Can you classify these sounds?

Emitted when people are active: I applaud L beat

Sent by nature: B wind C thunder E water flow G cricket

Emitted by other objects: A camera D car horn F broken glass H boat whistle K drum sound J explosion

A tuning fork is a sound-producing instrument

Purpose: debugging musical instruments and testing pitch

Structure (composed of 3 parts):

U-shaped metal fork with handle

Wooden box for amplifying volume

rubber hammer

There are letters and numbers on the tuning fork. The letters represent the pitch and the numbers represent the number of times the tuning fork vibrates per second.

Experiment

Compare the sounds produced by these two tuning forks. What are the differences? What are the different sounds when the same tuning fork is struck with different amounts of force? Use high, low, strong, weak to describe these sounds.

Experimental requirements:

1. Choose two tuning forks of different sizes and listen to the sounds they make.

2. Choose a tuning fork, hit it lightly first, then hit it harder.

Experimental steps:

1. Use the iron nails on the side to hit the three hanging iron nails: large, medium and small;

2. Keep quiet during the experiment, listen carefully to the sounds made by different nails, and compare the differences;

3. Record your homework in a notebook;

4. Knock the big iron nail lightly and harder. Find the difference and record it in your workbook.

Experimental results

1. Use the same method to knock different nails, and you will hear different sounds.

2. Using different methods, the same nail can produce different sounds.

Consolidation exercises

1. Strike two tuning forks of different sizes. The smaller one will make a louder sound.

2. If the same tuning fork is struck with different force, the intensity of the sound will change.

3. A tuning fork is a sound-producing instrument used to adjust musical instruments and test pitch.

Listen to the sounds made by gases, solids, and liquids

Think: What is the relationship between sound and objects? ( ).

Can there be sound without objects? ( ).

Liquids, solids, and gases can all make sounds

Sound is produced by objects

Sound has strength and pitch

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For more information about the PPT courseware "Sounds and Listening to Sounds", please click on the Sound PPT and Listening to Sounds PPT tab.

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File Info

Update Time: 2024-11-22

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

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