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Insulating Sound

In this worksheet, students will consider how sound is absorbed by materials and when and why we use sound insulation.

'Insulating Sound' worksheet

Key stage:  KS 2

Curriculum topic:  Sound

Curriculum subtopic:  How Sounds Travel

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

Sounds are all around us. We do not want to hear many of the sounds outside when we are inside our homes, for example: traffic noise.

 

TRaffic queue

 

Some materials are good at allowing sound to travel through them. They are DENSE MATERIALS.

 

Some materials are good at absorbing sound - they do not vibrate as well. These materials are called SOUND INSULATORS and are SOFT materials. In our homes we are surrounded by soft materials - curtains, carpets, duvets, soft furniture.

 

Sometimes we want to block-out sound because it can DAMAGE our ears!  The loudness of sound is measured in a unit called decibels (dB) and sounds in the region of 100dB can hurt our ears.

 

Let's find out more about insulating sound.

To allow sounds to travel QUICKLY, materials need to be...

soft

dense

coloured

shiny

Materials which ABSORB sounds are...

liquid

soft

shiny

smooth

Finish this sentence:

 

Sound insulators...........

reduce sound

increase sound

echo

Hard materials which do not absorb sound create... 

a loud noise

a soft noise

an echo

Which THREE of these objects in our homes ABSORB sound? 

walls

carpets

wooden floors

curtains

cushions

Ear defenders

 

We wear ear defenders because...

we don't like music

loud noise damages our ears

they look good

Which THREE objects INSIDE a car ABSORB the engine noise?

mats

speakers

carpet

exhaust

seats

Aeroplane engines are very loud. INSIDE an aeroplane what helps to muffle the engine sound?

altitude

carpets and seats

wings

Do you think that this statement is true or false?

 

Sound can be measured.

true

false

Do you know which units we use to measure the loudness of a sound?

decimals

decimeters

deciduous

decibels

  • Question 1

To allow sounds to travel QUICKLY, materials need to be...

CORRECT ANSWER
dense
EDDIE SAYS
The PARTICLES in dense materials are closely packed together. This allows the VIBRATIONS to travel through easily.
  • Question 2

Materials which ABSORB sounds are...

CORRECT ANSWER
soft
EDDIE SAYS
Soft materials absorb sound vibrations and make it quieter! Shoosh, I'm trying to sleep...
  • Question 3

Finish this sentence:

 

Sound insulators...........

CORRECT ANSWER
reduce sound
EDDIE SAYS
THat's right - insulators sort of protect you from loud sounds by blocking some of the noise, so they reduce the amount of sound reaching your ears.
  • Question 4

Hard materials which do not absorb sound create... 

CORRECT ANSWER
an echo
EDDIE SAYS
Hard materials REFLECT sound, making an ECHO, echo...
  • Question 5

Which THREE of these objects in our homes ABSORB sound? 

CORRECT ANSWER
carpets
curtains
cushions
EDDIE SAYS
SOFT materials ABSORB sound. Can you think of any more? Look around your room!
  • Question 6

Ear defenders

 

We wear ear defenders because...

CORRECT ANSWER
loud noise damages our ears
EDDIE SAYS
Sudden loud noises and loud noises over a long time damages our ears. Ear defenders, or ear plugs STOP the sound waves entering our ears.
  • Question 7

Which THREE objects INSIDE a car ABSORB the engine noise?

CORRECT ANSWER
mats
carpet
seats
EDDIE SAYS
SOFT materials ABSORB sound. Car exhausts are also designed to absorb sound OUTSIDE the car.
  • Question 8

Aeroplane engines are very loud. INSIDE an aeroplane what helps to muffle the engine sound?

CORRECT ANSWER
carpets and seats
EDDIE SAYS
Carpets and seats are soft! SOFT = SOUND ABSORBING. There will also be lots of sound-deadening material in the body of the plane to, to absorb the very loud noise that the plane makes.
  • Question 9

Do you think that this statement is true or false?

 

Sound can be measured.

CORRECT ANSWER
true
EDDIE SAYS
In the first instance you can tell whether a sound is quiet or loud, so all we need is a machine that listens to sound and then can turn it into a number. In fact, you can get phone apps that do a basic job. The loudness of a sound is measured in a unit called DECIBELS (dB) - the louder the sound, the more decibels it's producing, like a pneumatic road drill produces a 130dB noise!
  • Question 10

Do you know which units we use to measure the loudness of a sound?

CORRECT ANSWER
decibels
EDDIE SAYS
Loud noises, above 85 decibels can damage our ears.
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