Lecture 5 Flashcards
Strength of sound is measure in ____ and _____, which show how _____ the sound is
Amplitude and intensity
Loud
A stronger ultrasound pulse will produce a ________ ________
Stronger echo
What is amplitude
The maximum variation in pressure (or other acoustic variable). Unit varies depending on acoustic variable
“height” of the wave
The longer the wavelength the ______ the frequency and ________ the pitch
Lower and Lower
Higher amplitude = ____ sound
Louder
Mechanical waves transfer _____
Energy
What is power?
The rate at which energy is transferred
What is intensity
The rate at which energy passes through an area
A decrease in area cause and ____ in intensity aka ______
Increase in intensity aka focusing
Higher the intensity the ________ the returning echoes
Stronger
Stronger returning echoes results in ____
A better image
We move the focus where?
To the are of interest
Intensity is proportional to Amplitude _____
Squared
