Chapter 3

Question 1

Characteristic impedance

Answer 1

How much a material resists being moved
Zc = pc
Where p= density of the medium
And c= speed of sound

Then I= p2/Zc

Question 2

Reflection

Answer 2

Sound waves in air will be reflected by materials with a higher impedance than air

Much of the sound energy is reflected back

Question 3

Transmitted

Answer 3

Acoustic energy is pass through the object and it’s neighbors

Question 4

Absorbed

Answer 4

Acoustic energy converted to heat

Question 5

Diffraction

Answer 5

Low frequency sounds diffract more than high frequency

If object is about the same length as your wavelength, it will go right around it
-if object is bigger, you won’t get the same amount of bending