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Published by Bryant, 2021-08-24 05:09:36

Chap 10 Sound Waves

Chap 10 Sound Waves

Chapter 10
Sound Waves

Group 1

Teacher Group Members

Pn Nor Hayati • Foo Shibin
• Goh Ji Young
• Lee Chen Xin

10.1 Characteristics of Sound Waves

• Surrounding are filled with a variety of sounds.
• Sound is a form of energy caused by vibration.
• Example : Guitar will produce sound through vibration.

Transfer of Sound

• Requires a medium to propagate.

• Sound will propagate through a liquid , solid and gas but
not through vacuum.

• When a bell is rung , the metal surface of the bell will
vibrate.

• This vibration is transferred from one molecule to another
molecule which it produces sound.

Speed of transfer of sound in solids

Sound is transferred Particles at one end
very rapidly in solids of the solid start to

vibrate

Reason: VIBRATION

Nearby particles will
vibrate as the

particles of solids
are arranged very

closely together

Speed of transfer of sound in liquids

• The loose arrangement of particles in liquid causes sound
vibrations to be transferred less rapidly compared to solids.

Speed of transfer of sound in gases

• Sound waves propagate very slowly in gases.

• The arrangement of gas particles which are far apart
from each other causes a delay in transfer of vibration.

Reflection and Absorption of Sound

• Sound can be reflected and absorbed when it hits the
surface of an object.

• These characteristics are same as the characteristics of
light.

• The amount of sound reflected or absorbed depends on
the surface of the object.

Sound reflectors and Sound Absorbers

Good Sound Reflectors Good Sound Absorbers

• Hard and smooth • Soft and rough surfaces.
surfaces.
• Examples: carpet,
• Examples: marbles tiles, softboard.
wall.

The End
Thank You!


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