Doppler shift*

Question 1

what happens when you change the angle of insonation from 60 to zero and why?

Answer 1

the doppler shift will double because a doppler shift of 60 degrees has a cosine of 0.5 and multiple that by 2 because there are 2 shifts
1:going to the reflector
1: heading back to transducer

Question 2

what is the cosine of a doppler shift at 0 degrees?

Answer 2

1

Question 3

what is the cosine of a doppler shift at 60 degrees?

Answer 3

0.5

Question 4

what is the cosine of a doppler shift at 90 degrees?

Answer 4

0

Question 5

when you change the angle of insonation from 60 degrees to 30 degrees what will the doppler shift change to?

Answer 5

the doppler shift will increase by 50% the original doppler shift

Question 6

if you have a doppler shift of 10,000 Hz at an angle of 60 degrees and decide to change the angle to 30 degrees, what will the doppler shift be and why?

Answer 6

15,000 Hz because the doppler shift was 10,000 Hz at 60 degrees and 30 degrees is increasing by 50%, 50% of 10,000 is 5,000 and so you will add 5,000 Hz to the original doppler shift

Question 7

if you change your angle of insonation from 0 to 60 degrees what will the doppler shift be? and why?

Answer 7

the doppler shift will be halved because 0 is the best doppler shift, going up is losing doppler shift (closer to negative)

Question 8

if your doppler shift is 10,000 Hz at 0 degrees what will be your doppler shift at 60 degrees?

Answer 8

5,000 Hz at 60 degrees because half of 10 is 5

Question 9

if you change your doppler shift from 0 to 30 degrees what will your doppler shift be at 30 degrees?

Answer 9

it will decrease 25% the original doppler shift

Question 10

if your doppler shift is 10,000 Hz at zero degrees, what is your doppler shift at 30 degrees?

Answer 10

7,5000 Hz at 30 degrees

Question 11

if your doppler shift is 8,000 Hz at 60 degrees, what will be the doppler shift at 30 degrees?

Answer 11

12,000 Hz

Question 12

if your angle of insonation decrease what will your doppler shift do?

Answer 12

increase

Question 13

if your angle of insonation increase what will your doppler shift do?

Answer 13

decrease

Question 14

if your doppler shift is 8,000 Hz at 0 degrees, what will be the doppler shift at 30 degrees?

Answer 14

6,000 Hz

Question 15

if your doppler shift is 8,000 Hz at 0 degrees, what will be your doppler shift at 90 degrees?

Answer 15

0 Hz