Chapter 5 (Beginning of Exam 2) Flashcards
What is impedance measured in?
Ohms
net opposition to the flow of energy created by stiffness reactance, mass reactance and resistance
Impedance
From friction. One form of opposition to motion of the particles
Resistance
the form of opposition produced by the mass (density) and stiffness (elasticity) of the medium
Reactance
Resistance is frequency ____
Independent
Reactance is frequency ____
Dependent
What happens to impedance if there is low frequency in terms of mass reactance?
Low impedance
What happens to impedance if there is high frequency in terms of mass reactance?
High impedance
What happens to impedance if there is low frequency in terms of stiffness reactance?
High impedance
What happens to impedance if there is high frequency in terms of stiffness reactance?
Low impedance
The frequency at which a body vibrates with the greatest amplitude
This occurs when Xm = Xs.
Resonant frequency
No energy is lost because both mediums are the same
Impedance match
Energy is lost because mediums are different
Impedance mismatch
A vibrational pattern created within a medium when the vibrational frequency causes reflected waves from one end of the medium to interfere with incident waves from the source
Standing waves
What 2 things are needed for resonance?
Nodes and antinodes
