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Sound&light > Sound > Flashcards

Sound Flashcards

1
Q

How is sound created?

A

Sound is caused by the vibrations of particles that move in a wave-like motion.

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2
Q

What kind of waves are sound waves?

A

Longitudinal waves

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3
Q

How do air particles vibrate and move to your ears?

A

Energy transfers from an object to the air

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4
Q

Compression

A

Air molecules that are compact

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5
Q

Rarefaction

A

Air molecules that are further apart(than compression molecules)

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6
Q

Crest

A

The peak of a wave

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7
Q

Trough

A

The lowest point of a wave

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8
Q

Wavelength

A

The distance between two crests

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9
Q

What kind of frequencies and wavelengths do high notes have?

A

High frequencies and short wave lengths

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10
Q

What kind of frequencies and wavelengths do low notes have?

A

Low frequencies, long wavelengths

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11
Q

Frequency

A

The number of particles pass a point every second

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12
Q

How is the frequency calculated?

A

Wave crest/second

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13
Q

Amplitude

A

The height of a wave

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14
Q

What does the amplitude determine?

A

Whether the sound will be loud or soft

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15
Q

What does the amplitude show?

A

How far particles move within a wave

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16
Q

Types of waves

A

Longitudinal and transverse waves

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17
Q

Decibels

A

They measure the volume of sound

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18
Q

How are sound waves formed?

A

Sound waves are formed by compression and rarefaction particles that move away from a vibrating object

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19
Q

Medium

A

The area that sound (and light)travels through like gas

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20
Q

What don’t sound waves travel through?

A

Vaccums

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21
Q

What direction do transverse waves move?

A

Transverse waves move perpendicular so up and down

22
Q

What direction do longitudinal waves move?

A

Parallel so back and fourth like a spring

23
Q

Pitch

A

How low or high a sound is which is determined by frequency

24
Q

Functions of the outer ear

A

Collects sound waves

25
Q

Parts of the outer ear

A

Pinna and ear canal

26
Q

The function of the middle ear

A

Amplifies the sound

27
Q

Parts of the middle ear

A

Oval window, eustachian tube and the ossicle bones(hammer, anvil, stirrup)

28
Q

The function of the inner ear

A

Converts sound into nerve messages for the brain

29
Q

Parts of inner ear

A

Cochlea, Eardrum

30
Q

What volume and above in decibels can damage your ears?

A

90dB+

31
Q

Auditory nerve

A

Transports sound from the receptor cells to the brain

32
Q

Eustachian tube

A

Balances air pressure

33
Q

The ossicle bones:

A

Magnify vibrations from sound waves(or amplify the sound, same thing)

34
Q

Ear canal:

A

Moves sound waves from the pinna to the eardrum

35
Q

Pinna:

A

Collects sound waves

36
Q

Eardrum:

A

Vibrates when sound hits it and moves sound waves to the ossicle bones

37
Q

Semicircular canals:

A

Helps us maintain our balance

38
Q

Oval window:

A

Activates receptors and allows fluid in the cochlea to move

39
Q

Cochlea;

A

Converts sound waves into electrical signals(or nerve messages) for the brain

40
Q

Speed of sound

A

340km/hr

41
Q

What doesn’t sound waves travel through?

A

Vaccums

42
Q

Does sound travel faster through solids or liquids?

A

Solids

43
Q

Human hearing range

A

20Hz to 20,000 Hz

44
Q

Speed of sound in air

A

343m/s

45
Q

Why can’t sound travel through a vacuum like space

A

Space has particles that are too apart for sound waves to form

46
Q

How do concave lens treat myopia

A

Myopia is corrected with concave lens because they cause light rays to diverge which allows the eye to focus on objects further away

47
Q

How do convex lens treat hyperopia

A

Hyperopia is corrected with the convex lens as they cause light rays to converge so that the eye can focus on objects that are near.

48
Q

How does do we hear(pathway of sound)

A

Pinna collects the sound waves and the sound waves travel through the ear canal to the eardrum. The eardrum vibrates when the sound hits it and sends the vibrations to the ossicle bones. The ossicle bones amplify the sound waves and transfer them to the cochlea. The cochlea converts the sound waves into electrical signals which are carried to the brain by the auditory nerve. The brain then interprets the sound.

48
Q

How does do we hear(pathway of sound)

A

Pinna collects the sound waves and the sound waves travel through the ear canal to the ear drum. The ear drum vibrates when the sound hits it and sends the vibrations to the ossicle bones. The ossicle bones amplify the sound waves and transfer it to the cochlea.The cochlea converts the sound i

49
Q

Refractive index of s substance

A

The amount of light that bends when it passes through an object

Sound&light (4 decks)

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