Topic 8 Lesson 3a

FACTORS AFFECTING SOUND

Reflection and Transmission

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Sound (Mechanical Wave)

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Transmitted - move through

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Reflected - bounce off

Multiple Choice

Sound strikes a surface and some passes through, we call this what?

• transmission
• reflection
• absorption
• refraction

Multiple Choice

What type of wave is sound?

• Sound is a transverse wave.
• Sound is an electromagnetic wave.
• Sound is a mechanical wave.
• Sound is a longitudinal wave.

BEHAVIOR of SOUND

Absorption

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Absorption - Sound waves strike a

surface and lose energy quickly.

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Energy converted to thermal (heat) energy

Multiple Choice

Sound that is not transmitted or reflected is what?

• refracted
• amplified
• dispersed
• absorbed

Multiple Choice

The energy in the sound that is absorbed is converted into what type of energy?

• mechanical energy
• heat energy
• light energy
• nuclear energy

BEHAVIOR of SOUND

Diffraction

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Sound waves can bend around corners (hard surfaces)

Multiple Choice

When sound bends around hard surfaces we refer to this as?

• Diffraction
• Refraction
• Reflection
• Interference