chap 9 anatomy of sound beam purple questions

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Last updated 2:20 AM on 9/15/26

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10 Terms

1

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<p>What is the best estimate of the diameter or width of the sound beam as it exits the transducer?</p>

What is the best estimate of the diameter or width of the sound beam as it exits the transducer?

12mm

<p>12mm</p>

2

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<p>What is the diameter of the sound beam at a depth of 8 cm?</p>

What is the diameter of the sound beam at a depth of 8 cm?

6mm

<p>6mm</p>

3

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<p>What is the diameter of the sound beam at a depth of 16 cm?</p>

What is the diameter of the sound beam at a depth of 16 cm?

12mm

<p>12mm</p>

4

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<p>At what depth is the focus?</p>

At what depth is the focus?

8cm

focal depth = near zone length

<p>8cm</p><ul><li><p>focal depth = near zone length </p></li></ul><p></p>

5

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<p>What depth marks the beginning of the focal zone?</p>

What depth marks the beginning of the focal zone?

6cm

8-4=6

<p>6cm</p><ul><li><p>8-4=6 </p></li></ul><p></p>

6

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<p>What depth marks the end of the focal zone?</p>

What depth marks the end of the focal zone?

10cm

8+2=10

<p>10cm</p><ul><li><p>8+2=10</p></li></ul><p></p>

7

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<p>At which of the following depths is the beam narrowing?</p><p>A. 6cm</p><p>B. 8cm</p><p>C. 12cm</p><p>D. 10cm</p><p>E. 9cm</p><p></p>

At which of the following depths is the beam narrowing?

A. 6cm

B. 8cm

C. 12cm

D. 10cm

E. 9cm

A. 6cm

beam narrows with the near zone. the only depth within the near zone is choice A

8

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<p>At which of the following depths is the beam widening?</p><p>A. 2cm</p><p>B. 4cm</p><p>C. 6cm</p><p>D. 8cm</p><p>E. 9.375cm</p>

At which of the following depths is the beam widening?

A. 2cm

B. 4cm

C. 6cm

D. 8cm

E. 9.375cm

E. 9.375cm

the beans widens or diverges in the far zone. The only depth within the far zone is choice E

<p>E. 9.375cm</p><ul><li><p>the beans widens or diverges in the far zone. The only depth within the far zone is choice E</p></li></ul><p></p>

9

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<p>At which of the following depths is the be most likely to have the same diameter as it has at a depth of 11 cm?</p><p>A. 1cm</p><p>B. 3cm</p><p>C. 5cm</p><p>D. 8cm</p><p>E. 14cm</p><p></p>

At which of the following depths is the be most likely to have the same diameter as it has at a depth of 11 cm?

A. 1cm

B. 3cm

C. 5cm

D. 8cm

E. 14cm

C. 5cm

beam diameter will be similar when it is 3cm shallower and 3cm deeper than the focus
- 8+3=11cm
- 8-3=5cm

<p>C. 5cm</p><ul><li><p>beam diameter will be similar when it is 3cm shallower and 3cm deeper than the focus </p><ul><li><p>8+3=11cm</p></li><li><p>8-3=5cm</p></li></ul></li></ul><p></p>

10

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Which of the following terms does not belong?

A. Focus

B. End of the near zone

C. End of the Fraunhofer zone

D. Middle of the focal zone

C. End of the Fraunhofer zone

this is the very end of the sound beam
Fraunhofer zone = far zone