28/07/2020 Noise Management and Control - - Unit 6 - WEEK 5
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Course outline
How to access the portal WEEK 1 WEEK 2 WEEK 3 WEEK 4
WEEK 5
Lecture 25: 1-D sound wave propagation:
Kundt’s tube-I (unit?
unit=42&lesson=43) Lecture 26: 1-D sound wave propagation:
Kundt’s tube-II (unit?
unit=42&lesson=44) Lecture 27:
Radially propagating sound waves in
Due on 2019-09-04, 23:59 IST.
1 point 1)
1 point 2)
1 point 3)
Assignment 05
The due date for submitting this assignment has passed.
As per our records you have not submitted this assignment.
Which of the following instruments can be used for characterizing acoustic properties of a material?
Kundt’s tube Microphone Acoustic Analyzer Hydrophone
No, the answer is incorrect.
Score: 0
Accepted Answers:
Kundt’s tube
The term reflection coefficient (R) is defined as ___________________. (Where P+ and P_
are the pressures of forward and backward travelling wave respectively) P+ / P-
P- / P+
P+ - P- P+ + P-
No, the answer is incorrect.
Score: 0
Accepted Answers:
P- / P+
The definition of standing wave ratio (
ρ)
is:28/07/2020 Noise Management and Control - - Unit 6 - WEEK 5
https://onlinecourses.nptel.ac.in/noc19_me72/unit?unit=42&assessment=126 2/3
WEEK 6 WEEK 7 WEEK 8 WEEK 9 WEEK 10 WEEK 11 WEEK 12 spherical coordinate system-I (unit?
unit=42&lesson=45) Lecture 28:
Radially propagating sound waves in spherical coordinate system-II (unit?
unit=42&lesson=46) Lecture 29:
Complex impedance for radially propagating sound waves in spherical coordinate system (unit?
unit=42&lesson=47) Lecture 30:
Volume velocity- I (unit?
unit=42&lesson=48) Quiz :
Assignment 05 (assessment?
name=126) Feedback for Week 5 (unit?
unit=42&lesson=134)
1 point 4)
1 point 5)
1 point 6)
ρ
= (minimum pressure amplitude)/(maximum pressure amplitude)ρ
= (maximum pressure amplitude)/(minimum pressure amplitude)ρ
= (2 X minimum pressure amplitude)/(maximum pressure amplitude)ρ
= (2 X maximum pressure amplitude)/(minimum pressure amplitude) No, the answer is incorrect.Score: 0
Accepted Answers:
ρ
= (maximum pressure amplitude)/(minimum pressure amplitude)How many additional boundary conditions are required for solving pressure and velocity of sound wave through an open 1-D tube ?
1 2 3 4
No, the answer is incorrect.
Score: 0
Accepted Answers:
4
Which of the following options are true for an open tube at position x=0 ?
Perturbation in Pressure = 0 Perturbation in Velocity = 0
Perturbation in Pressure and Velocity = 0 None of above
No, the answer is incorrect.
Score: 0
Accepted Answers:
Perturbation in Pressure = 0
Which of the following equation represents sound propagation in cylindrical coordinate system ?
No, the answer is incorrect.
Score: 0
Accepted Answers:
28/07/2020 Noise Management and Control - - Unit 6 - WEEK 5
https://onlinecourses.nptel.ac.in/noc19_me72/unit?unit=42&assessment=126 3/3
1 point 7)
1 point 8)
Spherical waves behaves as planar waves when the distance of the wave front from the source is _____.
zero
λ/2π , where λ is the wavelength tends to infinity
None of the option are correct.
No, the answer is incorrect.
Score: 0
Accepted Answers:
tends to infinity
The solutions of a 1- dimensional wave equation can be written as
Here, F and G functions represents _________ respectively
Forward and reflected wave Reflected and forward wave Forward and standing wave Standing and forward wave No, the answer is incorrect.
Score: 0
Accepted Answers:
Forward and reflected wave
