chapter 6 physics

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