Chapter 2 Prep quiz
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