Book 2 ( Sound) Flashcards
How are sounds made
When an object vibrates
What left of a violin vibrates to make a sound
Strings
What part of a person vibrates to make a sound
Vocal chords
What part of a drum kit vibrates to make a sound
Drum skin
Sound is ————— wave
Longitudinal
This means that the direction of vibration is in the same direction as the movement if the wave
When do compressions occur
When particles are closest together
When do rare factions occur
When particles are furthest apart
What does sound travel in
Waves
What does sound travel fastest in
Solids
What does sound travel slowest in
Gasses
Where can sound not travel in
In a vacuum
What are all the different parts of the ear
Pinna
Ear canal
Ear drum
Middle ear bones
Semicircular canals
Auditory nerve
Cochlea
Eustachian tube
What parts make up the outer ear
Pinna ear canal, ear drum
What is the function of the outer ear
To capture the sound waves
What are the names of the 3 small bones in the ear
Malleus
Incus
Stapes
What is the purpose of the middle ear
To increase the sound vibrations
What is the Eustachian tube for
It goes into your mouth
To equalise the pressure in the ear drum
Where do the vibrations go behind the oval window
Cochlea
What do the fibres in the cochlea do
Turns the vibrations into electric signals in the nerve
Why does sound travel fastest in solids
Because it needs particles.
Solid particles are tightly packed and transmit sound quickly
