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science end of year 7 revision > physics sound glossary > Flashcards

physics sound glossary Flashcards

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1
Q

amplifier

A

a device used to make sounds louder

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2
Q

amplify

A

to increase the amplitude of a sound so that it sounds louder

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3
Q

audible range

A

the range of frequencies that you can hear

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4
Q

auditory canal

A

the passage in the ear from the outer ear to the ear drum

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5
Q

auditory nerve

A

an electrical signal travels along the auditory nerve to the brain

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6
Q

cochlea

A

snail-shaped tube in the inner ear with the sensory cells that detect sound

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7
Q

compression

A

the part of a longitudinal wave where the air particles are close together

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8
Q

crest

A

the top of a wave

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9
Q

decibel

A

a commonly used unit of sound intensity or loudness (dB).

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10
Q

diaphragm

A

the part of a microphone that vibrates when a sound hits it

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11
Q

ear

A

the organ of the body that detects sound

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12
Q

eardrum

A

a membrane that transmits sound vibrations from the outer ear the the middle ear

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13
Q

echo

A

a reflection of a sound wave by an object

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14
Q

hertz

A

the unit of frequency

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15
Q

incident wave

A

the wave coming from a source of light

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16
Q

infrasound

A

a sound below a frequency of 20 Hz

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17
Q

inner ear

A

the semi-circular canals that help you balance, and you cochlea

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18
Q

kilohertz

A

1 kilohertz=1000 hertz

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19
Q

longitudinal

A

how loud you perceive a sound of certain intensity to be

20
Q

medium

A

the material that affects light or sound by slowing it down or transferring the wave

21
Q

microphone

A

a device used for converting a sound into and electric signal

22
Q

middle ear

A

the ossicles (small bones) that transfer vibrations from the outer ear to the inner ear

23
Q

oscillation

A

something that moves backwards or forewards

24
Q

oscilloscope

A

a device that enables you to see electrical signals, like those made by a microscope

25
Q

ossicles

A

the small bones of the middle ear (hammer, anvil, and stirrup) ,that transfer vibrations from the eardrum to the oval window

26
Q

outer ear

A

The pinna, auditory canal, and eardrum

27
Q

oval window

A

the membrane that connects the ossicles to the cochlea

28
Q

pinna

A

the outside part of the ear (what we can see)

29
Q

pitch

A

a property of sound determined by its frequency

30
Q

rarefaction

A

the part of a longitudinal wave where air particles are spread out

31
Q

receiver

A

the device that absorbs the sound waves

32
Q

reflected wave

A

the wave that is reflected from a surface

33
Q

reflection

A

the change in direction of a ray or wave after it hits a surface and bounces off

34
Q

reverberation

A

the persistence of a sound for a longer period than normal

35
Q

sound

A

a series of compressions and rarefactions that move through a medium

36
Q

speed of light

A

the distance of light travelled in one second

37
Q

speed of sound

A

the distance sound travels in one second

38
Q

superpose

A

when waves join together so that they add up or cancel out

39
Q

transmitter

A

a device that gives out light our sound

40
Q

transverse

A

the vibrations are at right angles to the direction the waves move

41
Q

trough

A

the bottom of a wave

42
Q

ultrasound

A

sound at a frequency greater than 20,000 Hz, beyond the range of human hearing

43
Q

vacuum

A

a space in which there is no matter

44
Q

vibration

A

backwards and forwards motion of the parts of a liquid or solid

45
Q

vocal chords

A

the pieces of skin that vibrate to produce sound

science end of year 7 revision (16 decks)

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