Physics: Sound

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Longitudal waves
Waves of which their particles travel parallel to the direction of energy flow
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Tranverse waves
waves in which their particles travel perpendicular to the energy flow
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Loudspeakers
they work by converting electrical energy to kinetic energy. The wave hits a flexible plate called the diaphragm which vibrates like the eardrum and produces an electric signal like the cochlea.
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reflection
a sound wavereflects of a surface we hear an eacho. Hard and smooth surfaces are good at reflecting whereas soft and rough surfaces absorb the wave.
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oscilloscope trace
wave pattern seen upon the oscilloscope
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amplifier
makes a sound louder
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loudnesss and pitch
larger the amplitude the louder the sound. Higher the frequency the higher pitch the wave has. A short wavelength gives a high frequency.
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trough
minimum point of a wave
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crest
maximum point of a wave
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amplitude
distance between the center to the to the trough/crest
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pitch
how quickly the wave makes the air vibrate
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frequency
the number of waves passing a point at a time
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compression
when molecules are forced
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rarefaction
when molecules are given extra space
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quality
sounds with the same pitch and loudness
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superpose
when waves pass through the same medium at the same time time they pass through each other without getting disturbed
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ear drum
a tight sheet of skin which vibrates when sound hits it
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ear canal
a tube in which sound is carried from the pinna to the ear drum
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auditory nerve
sends nerve messages to the brain
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ear bones
pass on vibrations from the ear drum to the cochlea
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cochlea
contains sense cells that detect vibrations
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sense cells
are very delicate cells in the cochlea. If they are damaged they can lead the person to become partially deaf.
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Other cards in this set

Card 2

Front

waves in which their particles travel perpendicular to the energy flow

Back

Tranverse waves

Card 3

Front

they work by converting electrical energy to kinetic energy. The wave hits a flexible plate called the diaphragm which vibrates like the eardrum and produces an electric signal like the cochlea.

Back

Preview of the back of card 3

Card 4

Front

a sound wavereflects of a surface we hear an eacho. Hard and smooth surfaces are good at reflecting whereas soft and rough surfaces absorb the wave.

Back

Preview of the back of card 4

Card 5

Front

wave pattern seen upon the oscilloscope

Back

Preview of the back of card 5
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