Chapter 2 Prep quiz

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Interference patterns of reflected waves causes?

Acoustic Speckle

Distance is measured in?

Cm,Mm

In sound wave propagation, a region of elevated pressure is termed?

Compression

The portion of the sound beam where the molecules are squeezed together describes an area of?

Compression

Areas of high pressure and density are referred to as?

Compressions

For a longitudinal wave, the energy is transported by a series of_______ and ________ of the medium particles?

Compressions, Rarefactions

An interaction of echoes that leads to reinforcement rather than to partial or total cancellation is known as?

Constructive Interference

The time when two waves combine, and the resulting wave is of greater amplitude is known as?

Constructive Interference

Repetitious waves are a ___________ transfer of ___________________?

Cyclical, energy

The time when two waves combine, and the resulting wave is of lesser amplitude is known as?

Destructive Interference

The acoustic parameters include all the following except?

Distance

Which of the following best describes compression?

High density and High pressure

The time when the peaks of two waves occur at exactly the same time is known as?

In Phase waves

What will occur when there are waves of different frequencies interfering different moments in time?

In phases and be constructive and out phases and be destructive

The algebraic summation of waves leading to patterns of minima and maxima is called?

Interference

When more than one sound beam is traveling through a medium and on occasion, multiple beams arrive at an identical location at the same time. The waves lose their individual characteristics and combine to from a single wave. This phenomenon is called?

Interference

Particles that move in a direction that is parallel to the direction the wave propagates are known as?

Longitudinal Waves

Which of the following best describes rarefaction?

Low density and pressure

Density is defined as?

Mass per volume

Distance is defined as?

Measure of a particle motion

If a wave needs a medium to propagate it is a _______ wave?

Mechanical

Which of the following best characterizes an ultrasound wave in human tissue?

Mechanical Longitudinal wave

Mechanical waves must have a to propagate?

Medium

The time when the peaks of two waves occur at different times is known as?

Out of phase waves

A longitudinal wave is characterized by?

Particle motion occurring in the same direction as propagation

Pressure is measured in?

Pascals

The acoustic variables include all the following except?

Propagation Speed

The portion of the sound beam where the molecules are pulled apart describes an area of?

Rarefaction

What term infers to regions of decreased particle density in a sound beam?

Rarefaction

Areas of low pressure and density are referred to as?

Rarefactions

The regions of low pressure and density that are formed during sound propagation are termed?

Rarefactions

Which of the following describes sound propagation through a vacuum?

Sound cannot travel through a vacuum

Which of the following is not an example of an electromagnetic wave?

Sound wave

Which describes constructive interference?

Sound waves are in phase and resulting amplitude is increased.

Particles that move in a direction that is perpendicular to the direction of the wave propagates are known as?

Transverse waves

There is no sound in a __________, since there is no medium.

Vacuum

All waves transport?

energy

Pressure is defined as?

force per area

Density is measured in?

kg/cm^3

Sound is a ________, mechanical wave?

longitudinal

Sound is a _____________ wave?

longitudinal

Sound is a _________________, _____________ wave?

longitudinal and mechanical

Sound is a _____________ wave?

mechanical


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