Sound (Edexcel GCSE Physics): Flashcards
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Practise the cards
15 cards from this deck
Do sound waves travel through solids?
Do sound waves travel through solids?
Yes, causing vibrations
What does the outer ear do?
What does the outer ear do?
Collects sound & directs it down ear canal
What is the eardrum?
What is the eardrum?
Tightly stretched membrane that vibrates with sound
Effect of compression on eardrum
Effect of compression on eardrum
Moves inward
Effect of rarefaction on eardrum
Effect of rarefaction on eardrum
Moves outward
How does eardrum frequency compare to sound wave frequency?
How does eardrum frequency compare to sound wave frequency?
Same frequency
What are ossicles?
What are ossicles?
Small bones in middle ear (inc. stirrup bone)
Function of ossicles
Function of ossicles
Amplify sound waves from eardrum
Where do ossicles transfer vibrations to?
Where do ossicles transfer vibrations to?
Fluid in cochlea
What do different hair cells respond to?
What do different hair cells respond to?
Different sound frequencies
What do hair cells generate when detecting a frequency?
What do hair cells generate when detecting a frequency?
Electrical impulse sent to brain
Human hearing frequency range
Human hearing frequency range
Hz to kHz
Causes of hair cell damage
Causes of hair cell damage
Prolonged loud noise, ageing, smoking, chemotherapy, diabetes
Effect of age on hearing
Effect of age on hearing
Higher frequency hearing decreases
Why don't humans hear ultrasound?
Why don't humans hear ultrasound?
Not necessary for survival; vision more crucial