With increased awareness about the ill-effects of noise pollution, there is an increased demand to design quieter industrial products. Designing quiet products requires an appreciation of basic principles of acoustics and noise control. In this course, the students will be introduced to the foundations and concepts of acoustic wave propagation. Also, human factors influencing the perception of sound will be emphasized.
Intended Audience
4th year UG students, PG students of Mechanical, Civil, Aerospace, Ocean Engineering.
Core / Elective : Elective
UG/PG : PG
Pre-requisites
First level course in Vibration (Desirable), Exposure to Fourier Analysis, Interest in Mathematical Modeling
Dr.Abhijit Sarkar did his Ph.D on structual acoustics from IISc Bangalore in 2009. Since 2010 he is a faculty at IIT Madras. He also has two years industrial experience. He is an active researcher in the field of vibration and acoustics. He is especially interested in applying analytical methods to problems in noise and vibration. He has taught courses in mechanics, mechanisms, vibration and acoustics at IIT Madras.
Course LayoutÂ
Week 1 : Introduction to Sound, Acoustics, Noise Pollution
Week 2
: Governing Equations for Acoustics
Week 3 : Propagation and Reflection of Plane Waves, Spherical waves
Week 5 :
Transfer Matrix method for expansion chamber muffler.
Electro-Mechanical Analogy for lumped elements Electro-Mechanical
analogy for lumped elements
Week 6: Lumped acoustic
Elements, Helmholtz Resonator. Acoustic Analysis of an automotive
exhaust system, sourse impedence, radiation impedance.
Week 7
: Electro-acoustic analogy for duct acoustic systems Concentric hole
cavity resonator. spherical wave equation, pulsating sphere, spherical
wave impedance, limiting case of plane waves
Week 9 : Kirchoff-Helmholtz integral equation , BEM. Rayleigh Integral. Oscillating piston on a baffle
Week 10 : Sound radiation from infinite plate / beam Sound radiation from a baffled plate, conclusion
Suggested Reading
1. Fundamentals of Acoustics by L. E. Kinsler, A. R. Frey, A. B. Coppens and J. V. Sanders, John Wiley & Sons(2000) 2. Foundations of Engineering Acoustics by F. H. Fahy, Academic Press (2001) 3. Acoustics of ducts & Mufflers by M. L. Munjal, Wiley 2014
Certification Exam
The exam is optional for a fee. Exams will be on 22 Oct, 2017
Time: Shift 1: 9am-12 noon; Shift 2: 2pm-5pm
Any one shift can be chosen to write the exam for a course.
Registration url: Announcements will be made when the registration form is open for registrations.
The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published.
Certificate
Final score will be calculated as : 25% assignment score + 75% final exam score
25% assignment score is calculated as 25% of average of Best 8 out of 12 assignments.
E-Certificate will be given to those who register and write the exam and score greater than or equal to 40% final score. Certificate will have your name, photograph and the score in the final exam with the breakup. It will have the logos of NPTEL and IIT Madras.It will be e-verifiable at http://nptel.ac.in/noc/
