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Worksheetschapter 6 physics
Total questions: 20
Worksheet time: 10mins
sound waves weaken or ____ as they travel in the body
Reflect
Amplify
Attenuate
Travel in a straight line
After a transducer receives a sound wave during reception the sound waves is converted into a what ?
Electrical signal
Sound wave
Longitudinal wave
Logarithm
The signal is sent to the ultrasound system where it is strengthened or ampliflied
True
False
A standard measurement tool is used to report changes such as this
Logarithm
Standard measurement
Decibel notation
Amplification
A novel method of rating numbers
Logarithm
Log
Logarithmic scale
Tenfold
A common unit for measuring these signals ?
Decibel
Intensities
Relative changes
Sound beams
Decibal notation isn't logarithmic
True
False
Decibel notation is
Logarithmic
Comparison
A relative measurement
A ratio
All of the above
Reporting signals that's are increasing iin strength or getting larger is a
Positive change
Negative change
No change
None of the above
Signals that are decreasing or in strength or getting smaller is considered what ?
Positive decibels
negative decimals
Positive decimals
Negative decibels
3DB means
Half
1/4
Triple
Double
10DB
Ten times larger
1/10
-3B
Double
-3DB
Half
One tenth
Double
None of the above
-10DB
One tenth
-1/1O
Half
All of the above
Every 3 DB means the intensity will
Split
Triple
Half
Double
Every 10 DB change means that the intensity will
Decrease by 10
Increase ten times
Increase by 10
Decrease ten times
Attenuation occurs when ?
Sound waves strengthen or weaken as they propagate in a medium
Sound waves split as they propagate in a medium
Sound waves weaken as they propagate in a medium
The decrease in what parameters as sound travels is called attenuation ?
Power, period amplitude
Wavelength, frequency intensity
Intensity , amplitude , Power
Frequency intensity amplitude
Attenuation is determine by what two factors?
Frequency and sound
Path length and frequency sound
The distance that the sound travels directly effects attenuation the father the sound travels the greater attenuation and the weaker the sound
Beam becomes this makes the relationship between distance and attenuation what?
Inversely related
Directly related
Unrelated
