How do we hear? - · PDF file1. Sound waves are collected by the ear lobe or pinna. 2. The...

How do we hear? What happens when sound waves reach our ear?

© cgrahamphysics.com 2016

Starter - recap

Which sound is:

The quietest

The loudest

The highest

The lowest


‘Ear’ ear Starter: Answer TRUE or FALSE Challenge: Answer why?

1) If your eardrum breaks you will be deaf forever 2) People use their ears in the same way bats do 3) Antibiotics can treat some hearing problems 4) The ear bones are in the middle of the ear


Objectives:

• Name the parts and positions of the ear

• Describe how sound is detected by the ear

• Explain some different types of hearing loss

‘Ear’ ear


1. Sound waves are collected by the ear lobe or pinna.

2. The waves travel along the ear canal.

3. The waves make the ear drum vibrate.

4. The small bones [ossicles] amplify the vibrations.

5. The cochlea turns the vibrations into electrical signals.

6. The auditory nerve takes the signals to the brain.

The Ear


The Ear


Ears and hearing

Something vibrates to produce a sound. Sound travels through _____________ to the ear.

When the vibrations reach the eardrum they are transferred to the small _____________ called the hammer, anvil and stirrup. The bones pass the vibrations to the ____________.

This contains sense cells which change the vibrations to _____________ signals called impulses.

The auditory nerve takes the _____________ to the brain. We hear the sound when the message reaches the _____________ .

Ear canal

bones

cochlea

electrical

signals

brain © cgrahamphysics.com 2016

Sound key words

sound – A form of energy produced by vibrations, which is detected by the ear

cochlea – The part of the inner ear that changes vibrations into electrical signals which are then sent to the brain.

eardrum – The thin membrane in the ear which vibrates when sound reaches it.


Fun ear facts

Movie Sound - Lesson 4 - Ears All Shapes and Sizes.avi

Movie Sound - Lesson 4 - Human Body Ear - Hearing.avi



















Use the questions and answers below to write sentences about the ear in your book.


• Are 2 ears better than 1 for determining the direction of a sound?

• Could you devise an experiment to test this?


The ear and hearing summary

Plenary


How do we hear? - · PDF file1. Sound waves are collected by the ear lobe or pinna. 2. The...

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