Rates Flashcards

1
Q

Prop speed of air

A

330 m/s

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2
Q

Prop speed of lungs

A

660 m/s

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3
Q

Prop speed of water

A

1480 m/s

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4
Q

Prop speed of soft tissue

A

1540 m/s

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5
Q

Prop speed of liver

A

1555 m/s

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6
Q

Prop speed of blood

A

1560 m/s

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7
Q

Prop speed of bone

A

4080 m/s

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8
Q

Infrasound

A

<20 Hz

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9
Q

Audible

A

20-20,000 Hz

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10
Q

Ultrasound

A

> 20,000 Hz

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11
Q

DMS

A

Between 2 and 15 MHz

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12
Q

+3 dB

A

Double

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13
Q

-3dB

A

One half

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14
Q

+6 dB

A

Quadruple

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15
Q

-6 dB

A

One fourth

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16
Q

+10dB

A

X10

17
Q

-10dB

A

1/10

18
Q

+20 dB

A

X100

19
Q

-20dB

A

1/100

20
Q

Average rate of attenuation in soft tissue

A

0.7 dB/cm/MHz

21
Q

SP/SA factor

A

Usually >1

22
Q

Round trip time

A

13 us/cm

23
Q

8 bits of memory

A

256 shades of gray

24
Q

1 byte

A

8 bits

25
Q

Capacitance of veins

A

2/3 of blood in body

26
Q

Turbulent flow

A

Reynolds’s number >2000