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"Changes of Sound" Sound PPT Courseware
Observe and compare changes in sound intensity
1. Gently move the ruler
2. Move the ruler hard
Observe the intensity of the sound and the amplitude of the vibration
The strength of sound can be described by volume.
The greater the vibration amplitude, the stronger the sound;
The smaller the vibration amplitude, the weaker the sound.
Unit of volume: decibel (dB)
The level of sound can be described by pitch,
Pitch is a quantity that describes how fast an object vibrates.
The faster an object vibrates, the higher the sound it makes;
The slower an object vibrates, the lower the sound it makes.
Unit of pitch: Hertz (Hz)
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"Changes of Sound" Sound PPT Download:
"Changes of Sound" Sound PPT Download Part One: Introduction of New Lessons Do students usually like to play with toys? Today we are also going to play with toys. We are not only competing to see who can play well, but also competing to see who has gained more knowledge while playing. Today the teacher...
"Changes of Sound" Sound PPT:
"Changes in Sound" Sound PPT Part 1: Observe and compare changes in sound intensity. Make part of a steel ruler or plastic ruler extend out of the table about 10 to 12cm. Use one hand to hold one end of the ruler, and the other hand to move the other end of the ruler. First gently move...
"Changes of Sound" Sound PPT Courseware 5:
"Changes in Sound" Sound PPT Courseware 5 Comparative Experiment 1: Observe and compare the changes in sound intensity Requirements: Take a steel ruler or part of a plastic ruler and extend it about 10-12 cm from the table. Press one end of the ruler with one hand and dial the other end of the ruler with the other hand. ..