Sound Waves 2

Question 1

Is intensity; power; amplitude directly or indirectly related?

Answer 1

Directly Related

Question 2

What is intensity proportional to?

Answer 2

Power or mathematically, to the waves Amplitude².

Question 3

What always follows the word ampitude?

Answer 3

squared

Question 4

What is power related to?

Answer 4

Amplitude²

Question 5

What is intensity related to?

Answer 5

Amplitude²

Question 6

What happens to intensity if a waves power is doubled?

Answer 6

intensity is doubled

Question 7

What happens to intensity if a waves power is quartered?

Answer 7

intensity is quartered.

Question 8

What happens if a waves amplitude is doubled?

Answer 8

Intensity increases 4 times.

Question 9

What is the symbol for wavelength?

Answer 9

λ

Question 10

What term describes the length/distance of one complete cycle?

Answer 10

Wavelength

Question 11

What is a wavelength determined by?

Answer 11

both the sound source and medium

Question 12

Can wavelength be adjusted?

Answer 12

No

Question 13

What is the propagation speed of sound in soft tissue?

Answer 13

1.54

Question 14

What is the only parameter determined by both sound source and Medium?

Answer 14

Wavelength

Question 15

How is wavelength and frequ3eny related?

Answer 15

inversely related

Question 16

What is the equation for finding the wavelength of sound in a medium?

Answer 16

1.54 ÷ frequency

Question 17

As frequency increases, wavelenght…..

Answer 17

decreases

Question 18

Does a shorter wavelength produce higher or lower quality images?

Answer 18

Higher quality images.

Question 19

How are wavelength and intensity related?

Answer 19

unrelated

Question 20

_____________ is the distance a sound wave travels in 1 second.

Answer 20

Propogation speed

Question 21

What is the unity for propagation speed?

Answer 21

distance ÷ time

Meters/second mm/µs

Question 22

What is propagation speed determined by?

Answer 22

Medium only

Question 23

True or False, all sound travels at the same speed regardless of frequency.

Answer 23

True.

Question 24

Can propagation speed be adjusted?

Answer 24

No

Question 25

What does propagation speed depend on?

Answer 25

Density and stiffness

Question 26

What are the 3 ways you can report speed of sound in soft tissue?

Answer 26

1.540 m/s 1.54 mm/µs 1.54 km/s

Question 27

How is propagation speed determined?

Answer 27

Frequency x wavelength

Question 28

What does sound travel fastest in?

Answer 28

solids

Question 29

What does sound travel slowest in?

Answer 29

gasses

Question 30

What characteristics affect the speed of sound?

Answer 30

density and stiffness

Question 31

What describes the ability of an object to resist compression?

Answer 31

stiffness

Question 32

How is stiffness and speed related?

Answer 32

directly

Question 33

What happens to the speed of sound when a medium becomes stiffer?

Answer 33

Speed of sound increases.

Question 34

How can the degree of stiffness be described?

Answer 34

With the term elasticity or compressibility

Question 35

Is elasticity/ compressibility the same or different as stiffness?

Answer 35

opposite of stiffness

Question 35

How is elasticity and speed related?

Answer 35

inversely

Question 36

How are non-stiff medium described?

Answer 36

compressible or elastic

Question 37

What describes the weight of a material?

Answer 37

Density

Question 38

Does non-dense material weight a lot or a little?

Answer 38

A Little

Question 39

How are density and speed related?

Answer 39

Inversely

Question 40

What happens to the speed of sound as a medium becomes more dense?

Answer 40

speed of sound decreases

Question 41

True or False, Sound travels faster in medium with a higher density?

Answer 41

False, sound travels faster in a medium with lower density.

Question 42

If 2 medium have the same stiffness, which one will have the lower speed?

Answer 42

The denser medium.

Question 43

True or False, when density decreases, speed decreases.

Answer 43

False

Question 44

Materials that are stiff, but not dense will have _______ speed.

Answer 44

fast

Question 45

Materials that are not still but very dense will have a _______ speed.

Answer 45

slower

Question 46

Which parameter is only determined by the medium?

Answer 46

speed

Question 47

What 3 parameters are adjustable?

Answer 47

Amplitude, power, and intensity

Question 48

What are bioeffects?

Answer 48

The effects of sound on tissue.

Question 49

What are acoustic propagation properties?

Answer 49

The effects of tissue of a sound wave.