Sound Flashcards
When are sounds made
When an object vibrates
What vibrates when these make these sounds
a)violin
b)singer
c)drum kit
a)strings
b)vocal cord
c)drum skins
In a spring why do the coil’s move back and fourth
Because the wave is moving along the spring
Sound travels in
Waves
What do waves do
Carry energy from one place to another
What type of wave is sound
A longitudinal wave
Longitudinal
The direction of the vibration is the same direction as the movement of the wave (parallel )
Sound travels through air as a series of
Compressions and rare factions
Compressions occur when
Particles are closest together
Rare factions occur when
Particles are furthest apart
What happens when air is removed from the bell jar
We can see the bell ring but can’t hear it
Sound needs what to be transmitted
Particles
Where does sound travel
a)fastest
b)slowest
c)not at all
a)solids
b)gases
c)vacuum
What makes up the outer ear
Pinna,ear canal and ear drum
What is the function of the pinnacle,ear canal and ear drum
Collect and funnel sound waves to ear drum
What is made by the body to keep the ear clean(what can be the issue)
Ear wax-there can be a build up sometimes
What 3 small bones make up the middle ear
Stirrup,hammer and anvil
What is the purposes of the middle ear
Amplifies the sound vibrations
What does the eustachian do
Connects to the throat and equalises the pressure
What makes up the inner ear
Semicircular canals
Auditory nerve
Cochlea
Where do the vibrations go beyond the oval window
The cochlea
What is found in the cochlea
Fluid and hairs(fibres)
What do the fibres in the cochlea do
Sway in the fluid(sound moves it)which sends an electrical impulse to the brain 🧠
Why does sound travel fastest in solids
Because the particles are packed tightly making it more dense therefore transmitting sound quicker
What is the calculation for distance
Speed x time
Sound needs what to travel
Medium or material
What speed does light travel at
300,000,000m/s
What speed does sound travel
330m/s
What is the calculation for speed
Distance ➗ time
Why does sound travel faster through warmer air than colder
warmer molecules move through air more quickly therefore transmitting sound quicker
What speed does sound travel through
a)air
b)steel
c)lake water
a)340m/s
b)5000m/s
c)1500m/s
Calculation for time
Distance ➗ speed
Peak/creast
Tip of a wave
Trough
Bottom of the wave
The distance from peak to peak or trough to trough (length of 1 wave)
Wavelength
Amplitude
The height of a peak in the wave
Amplitude=
Loudnesses
Pitch=
Frequency
Louder sound
Quieter sound
Higher amplitude
Lower amplitude
Higher pitch
Lower pitch
Higher frequency
Lower frequency
What is the average sound range of a healthy human
20Hz to 20000Hz
Sounds above 20000 are known as
Ultrasound
Sounds below 20Hz are known as
Infrasound
What are the 3 bones in the ear called
Ossicles
Auditory nerve
Responsible for sending vibrations(sound waves)to the brain
Ear drum
Thin piece of skin-like tissue that stretched across the opening between the ear canal and the middle ear 
How do we hear
Sound waves travel through the air
The pinna Directs the waves into the ear canal
The waves make the eardrum vibrate
This Intern makes the small bones, vibrate,
The small bones make the cochlea vibrate,
The hairs on the cochlea turn the wave into an electrical impulse
The impulse travels along the auditory nerve to the brain 
Frequency
The number of waves that pass a point every second
What are high pressured areas called in a wave
Compression
What are the low areas of pressure in a wave called? 
Rare faction
What unit is frequency measured in?
Hertz(Hz)
What do sound waves transmit to the particles they touch?
Energy
Waves with a high frequency have
Waves with a lower frequency have
More energy
Less energy
