# Ultrasound Physics Ch. 2 - 6

42 Questions | Total Attempts: 2356  Settings  An extra help for those of you who are studying for the SPI. It will be based on chapters 2 - 6

• 1.
Sound waves carry energy
• A.

True

• B.

False

• 2.
Sound waves are longitudinal waves sound travels in a straight line
• A.

True

• B.

False

• 3.
What are the acousitic variables?
• A.

Pressure, density, distance

• B.

Period, frequency, amplitude, power, intensity, wavelength, propagation speed

• 4.
What are the acoustic parameters?
• A.

Pressure density distance

• B.

Period frequency amplitude power intensity wavelength propagation speed

• 5.
A pair of waves are considered out of phase when their peaks occur at the same time and location
• A.

True

• B.

False

• 6.
Infrasound is?
• A.

• B.

Between 20 Hz & 20 kHz

• C.

>20 kHz

• 7.
Period and frequency are determined by?
• A.

Sound source

• B.

Sound source and medium

• C.

Medium

• 8.
Period and frequency are
• A.

Inversely

• B.

Directly

• C.

Proportional

• D.

Reciprocal

• 9.
Amplitude has which units?
• A.

Acoustic variables

• B.

Watts

• C.

Energy

• 10.
Amplitude , power, intensity are determined by the
• A.

Medium

• B.

Sound source

• C.

Both sound source and medium

• 11.
Amplitude, power, intensity are not adjustable
• A.

True

• B.

False

• 12.
Wavelength is determined by
• A.

Sound source

• B.

Medium

• C.

Both

• 13.
As frequency increases, wavelength decreases
• A.

True

• B.

False

• 14.
Which type of wavelength sound produces higher quality images with greater detail?
• A.

Short

• B.

Long

• C.

Either one

• 15.
Propagation speed is determined by
• A.

Sound source

• B.

Medium

• C.

Both

• 16.
What is the speed in liver?
• A.

1540 m/s

• B.

1450 m/s

• C.

1560 m/s

• D.

3500 m/s

• 17.
If the power of a wave is tripled the intensity is reduced to one third
• A.

True

• B.

False

• 18.
The effects of sound waves on tissue in the body are called?
• A.

Acoustic propagation properties

• B.

Bioeffects

• 19.
The start of a pulse to the end of that pulse is reffering to ....
• A.

Spatial pulse length

• B.

Pulse repition period

• C.

Pulse repition frequency

• D.

Dulse duration

• 20.
What is pulse duration's formula?
• A.

# of cycles x wavelength / frequency

• B.

Has no formula

• C.

# of cycles x wavelength

• D.

# of cycles / frequency

• 21.
Pulse duration is directly related to the frequency
• A.

True

• B.

False

• 22.
What is spatial pulse length definition?
• A.

Distance that a pulse occupies in space from start to the end of a pulse

• B.

Time that a pulse occupies in space from start to the end of a pulse

• C.

Time from the start of a pulse to the start of the next pulse

• D.

The number of pulses that an ultrasound system transmits into the body each second

• 23.
Is pulse repition period (PRP) adjustable?
• A.

Yes

• B.

No

• 24.
Depth of view describes the minimum distance into the body that an ultrasound system is imaging
• A.

True

• B.

False

• 25.
How are PRP and depth related?
• A.

Directly

• B.

Inversly

• C.

No relationship

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