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Ultrasound Physics chapter 1-3 > Seven Acoustic Parameters > Flashcards

Seven Acoustic Parameters Flashcards

1
Q

Propagation Speed

A

Rate at which sound wave travels through a medium

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2
Q

What are the units of speed?

A

m/s

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3
Q

What is speed determined by?

A

Medium

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4
Q

What is the typical values of speed?

A

1,500-1,600 m/s

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5
Q

Is speed adjustable?

A

NO

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6
Q

Intensity

A

Concentration of energy in a sound beam

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7
Q

What are the units of intensity?

A

Watts/cm2, dB

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8
Q

What is intensity determined by?

A

Sound source

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9
Q

What are the typical values of intensity?

A

0.01-300 W/cm2

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10
Q

Is intensity adjustable?

A

YES! Alter the initial intensity of a wave

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11
Q

Period

A

The time it takes one wave to vibrate one single cycle

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12
Q

What are the units of period

A

Seconds microseconds time

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13
Q

What is period determined by?

A

Sound source

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14
Q

What are the typical values of period

A

0.06-0.5 microseconds

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15
Q

Is period adjustable

A

NO

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16
Q

Wavelength

A

Distance or length of 1 complete cycle

17
Q

What are the units of wavelength

A

mm distance

18
Q

What is wavelength determined by?

A

Both sound source and medium

19
Q

What are the typical values of wavelength

A

0.1-0.8 mm

20
Q

Is wavelength adjustable?

A

No

21
Q

Frequency

A

Is the number of particular events that occur in a specific duration of time

22
Q

What are the units of frequency

A

Per second Hz

23
Q

What is frequency determined by?

A

Sound source

24
Q

What are the typical values of frequency?

A

2-15 MHz

25
Q

Can frequency be adjusted?

A

No

26
Q

Amplitude

A

Difference between the max value and average or undisturbed value of an acoustic variable

27
Q

What are the units of amplitude?

A

Pascal cm, g/cm3, dB

28
Q

What is amplitude determined by?

A

Sound source

29
Q

What are the typical values of amplitude

A

1MPa- 3MPa

30
Q

Can you adjust amplitude?

A

YES! Alter initial amplitude of a wave

31
Q

Power

A

Rate at which energy transfered

32
Q

What are the units of Power?

A

0.004-0.090 watts

33
Q

what is power determined by?

A

Sound Source

34
Q

Is power adjustable?

A

YES! Alters initial power of a wave

Ultrasound Physics chapter 1-3 (5 decks)

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