Muffling Sound

What does muffle mean?

• To make a sound louder

• To make a sound softer

• To make a sound higher

Why do we need to muffle some sounds?

• To protect our ears

• To hurt our ears

• To make sounds louder

What is he wearing?

• Ear silencers

• Earphones

• Ear defenders

A person needs ear defenders for which job?

• Builder

• Teacher

• Taxi driver

What factor needs to change when we test how materials muffle sounds?

• The sound source

• The materials

• The volume

Which factors cannot change when we test how different materials muffle sound? (choose THREE answers)

• The volume

• The materials

• The sound source

• The room we do the test in

What does muffle mean?

• To make a sound louder

• To make a sound softer

• To make a sound higher

we fit silencers to cars, trucks and motor cycles to muffle sounds

• true

• false

cotton and wool materials are not good to muffle sound

• true

• false

In buildings we use carpets and curtains to stop noise.

• true

• false