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Flashcards in Sound Deck (18)
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1

Waves

Vibrations set in motion
A way to transmit energy from one location to the next

2

Wavelength

Distance between any two repeating parts of a wave

3

Translational waves

Have crests and troughs (looks like normal waves)

4

Compression waves

Need a medium to travel through like air or water

5

Places where the waves are spread apart vs close together

Apart- ratification
Close- areas of compression

6

Frequency

Number of wave cycles that pass any one point per second
Hertz=1 wave cycle per second
10 hertz= 10 wave cycles per second

7

Wave speed =?????

Wave speed = wavelength x frequency
300m. = 100 m. x. 3 cycles

8

All electro,agnetic radiation from radio waves travel at

300,000 km per second

9

Speed of sound in air vs water

Air- 1,100 ft per second
Water- 4,500 ft per second

10

Reflection

When a wave bounces off something

11

Angle of incidence vs angle of reflection

Incidence is up top and reflection is bottom

12

Refraction vs diffraction

R- the bending of a wave as it moves to one medium to another (straw in water looks demented bc light waves are going from air to water)

D-causes waves to spread out evenly when opening is the same size as wave length

13

Constructive vs destructive interference

C- increase in amplitude when two waves come together

D- waves collide trough to crest and it cancels the amplitude out

14

Doppler effect

Pattern of sound waves spread out & when the object making the sound is moving the waves are different (ambulance)

If plane goes faster than speed of sound it's a bunch of circles sorta over lapping

15

Boat example

V shape behind boat is constructive/destructive interference of waves

16

Sonar

Sonar bonds depend of temperature of water
Submarines try to find thermal layers where sonar can't go

17

100 decibel

Damage to ears

18

Amplitude

Half the height of a wave