Module 5

Question 1

( Blank) is the frequency at which an object vibrates freely and is determined by the object’s Length, density, tension and stiffness

Answer 1

Natural frequency

Question 2

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

Answer 2

natural frequency

Question 2

( Blank) The frequency at which the resonance occurs.
- the frequency at which the resonator undergoes the greatest vibratory response.

Answer 2

Resonant frequency

Question 3

What is Resonance?

Answer 3

the ability of an object to vibrate with the most energy at its natural frequency

Question 4

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 _________.

Answer 4

applied force

Question 5

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.

Answer 5

amplitude

Question 6

What is the spring-mass model ?

Question 7

spring-mass model
Objects with mass have inertia which means ?

Answer 7

they are going to resist acceleration and deceleration

Question 8

Elasticity or the recoil (or restoring) forces and inertia act _______ during the vibration.

Answer 8

together

Question 9

What determines the frequency of a spring mass model?

Answer 9

that more mass will decrease the resonant frequency of the vibratory object.

Question 10

Stiffness can also __________ the resonant frequency of a vibrating object.

Answer 10

Change

Question 11

( Blank) is the amount of force needed to displace an object some distance

Answer 11

Stiffness
Force/Meters (K = N/m)

Question 12

Stiffer objects require ______ force to move them the same distance

Answer 12

more

Question 13

And an increase in stiffness would ____ the object’s resonant frequency.

Answer 13

need

Question 14

Our vocal tract is kinda like a ____.

Answer 14

Tube

Question 15

Wavelength isa the spatial period of the wave. the distance over which the wave’s shape _____.

Answer 15

repeats

Question 16

Acoustic resonators________ out some frequencies and let others stay

Answer 16

filters

Question 17

– Frequencies closest to the tube’s natural frequency will be __________ .
– Frequencies farthest away will be ________.

Answer 17

amplified
dampened

Question 18

Source- Vocal folds
Filter - Vocal tract

Answer 19

Open tube

Question 20

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 )

Answer 20

Open Tube

Question 21

What is Cul-de-sac nasality?

Answer 21

ack of normal oral resonance that often results in a muffled, nasopharyngeal quality