Module 5 Flashcards
2/5 Resonace (23 cards)
( Blank) is the frequency at which an object vibrates freely and is determined by the object’s Length, density, tension and stiffness
Natural frequency
Synonym for resonance =
Note:
- If an object vibrates at its natural frequency, displacement ( amplitude) will be maximal
- The object will still vibrate given other frequencies, but just not with maximum energy
natural frequency
( Blank) The frequency at which the resonance occurs.
- the frequency at which the resonator undergoes the greatest vibratory response.
Resonant frequency
What is Resonance?
the ability of an object to vibrate with the most energy at its natural frequency
When a periodically vibrating force is applied to an elastic system, the elastic system will be forced to vibrate initially at the frequency of the _________.
applied force
The nearer the frequency of the applied force to the natural or resonant frequency of the elastic system, the greater will be the resulting ________ of vibration.
amplitude
What is the spring-mass model ?
spring-mass model
Objects with mass have inertia which means ?
they are going to resist acceleration and deceleration
Elasticity or the recoil (or restoring) forces and inertia act _______ during the vibration.
together
What determines the frequency of a spring mass model?
that more mass will decrease the resonant frequency of the vibratory object.
Stiffness can also __________ the resonant frequency of a vibrating object.
Change
( Blank) is the amount of force needed to displace an object some distance
Stiffness
Force/Meters (K = N/m)
Stiffer objects require ______ force to move them the same distance
more
And an increase in stiffness would ____ the object’s resonant frequency.
need
Our vocal tract is kinda like a ____.
Tube
Wavelength isa the spatial period of the wave. the distance over which the wave’s shape _____.
repeats
Acoustic resonators________ out some frequencies and let others stay
filters
– Frequencies closest to the tube’s natural frequency will be __________ .
– Frequencies farthest away will be ________.
amplified
dampened
Source- Vocal folds
Filter - Vocal tract
Open tube
This description represents a ?
Represents your Vocal Tract
· The right end of this tube is closed and there is a loudspeaker at the left end, which is open
A is open = 0 is equilibrium
B is closed , at its maximal point
¾
1 quarter
1 ¼ quarter (divided by 5 quarters )
· No atmospheric pressure on the right side, so it will act differently
· Pressures are proportional to the number of air molecule collission per unit time _
- the pressure is higher when more air molecules creates the max displacement
· Pressure will be zero at the open end and maximally displaced at the closed end
Quarter-wavelength rule
* It is a quarter-wavelength fit into the length of the tube
Formula is: fr = (2n-1) x c/4l
Fr = Frequency
—-> changing n= 1,2,3,4
c= Speech of sound ( will be provided)
2 x l ( length )
Open Tube
What is Cul-de-sac nasality?
ack of normal oral resonance that often results in a muffled, nasopharyngeal quality
