What are period, frequency, amplitude, power, intensity, wavelength, and speed
100
This is a description for the term orthogonal incidence
What is normal incidence
100
This is the unit for frequency
What is hertz (1 cycle/second also accepted)
100
This is the formula we would use if we were given area
What is intensity = (power/area)
100
These are the factors that determine attenuation
What are path length & frequency of sound
200
This parameter is defined as the difference between the maximum value and the average or undisturbed value of an acoustic variable describing the bigness of a wave
What is amplitude (peak-to-peak amplitude NOT accepted)
200
The rule of conservation of energy states incident intensity equals this
What is reflected intensity + transmitted intensity
200
The unit is watts to describe this sound characteristic
What is power
200
This is the formula we would use if we were trying to find the wavelength
What is wavelength = (speed of sound/frequency)
200
These are the processes that contribute to attenuation
What are reflection, scattering, and absorption
300
This is the characteristic about speed that differentiates it from ALL of the other parameters
What is determined by the medium
300
This is the unit for ITC
What is % (has no unit, it is a percentage)
300
This is the unit for attenuation
What is dB (decibels)
300
This is the formula for impedance
What is impedance = density X propagation speed
300
When the frequency of a probe decreases, this happens to attenuation
What is decreases
400
This factor is most important when talking about propagation speed
What is stiffness
400
Sound strikes a boundary at an oblique incidence. The angle of incident is 30 degrees. This is the angle of reflection.
What is 30 degrees (angle of incidence = angle of reflection).
400
This is the unit for half value thickness layer
What is distance (mm, cm, meters)
400
This is the formula (drawn on the board) for IRC with normal incidence
What is IRC = [(Z2-Z1) / (Z2 +Z1)]^2 X 100
400
This term is the number of decibels of attenuation that occurs when sound travels one centimeter.
What is attenuation coeficient
500
3 sound waves are evaluated traveling in one medium. All three waves have different frequencies ranging from low, medium, and high. This is how the propagation speed changes with the increasing frequency.
What is travels at the same speed
500
A sound beam strikes a boundary at oblique incidence. The speed of sound in medium 1 is faster than the speed of sound in medium 2. This is how the transmitted angle will differ from the incident angle
What is transmission angle is less than incident angle
500
Rayls is the unit that describes this characteristic of sound
What is impendance
500
This is the formula (drawn on the board) to quantify refraction
What is sine (transmission angle)/ sin(incident angle) = C2/C1
500
This medium has the least attenuation out of the following:
Air, bone, muscle, water, soft tissue, blood, fat