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Swayam Central

Acoustic Materials and Metamaterials

By Prof. Sneha Singh   |   IIT Roorkee

The study of electromagnetic and acoustic waves is an endeavor that dates back centuries. An important sub-domain of this field that effects our daily life is the use of acoustic principles to control environmental noise. In this regard, acoustic materials, which are materials designed to manipulate sound wave propagation, are of prime importance. Within this field, about three decades ago, the concept of metamaterials was proposed that has created a revolution. Theoretical formulation and experiments have shown the feasibility of realizing man-made acoustic metamaterials that can manipulate waves beyond the defined limits of those found in nature. Therefore, within a time span of 15 years, acoustic materials have emerged as an active field driven by scientific discoveries and diverse application potentials in machinery noise control, frequency filtering, speech transmission technology, acoustic imaging, and cloaking. This is the first-ever organized coursework on acoustic materials with a special focus on acoustic metamaterials. This course will cover the following topics:

  • Acoustic fundamentals
  • Theory and design principles of acoustic barrier materials
  • Theory and design principles of sound absorbing materials
  • Limitations of conventional materials
  • Principles of acoustic metamaterials
  • Theory and design principles of membrane type metamaterials
  • Theory and design principles of sonic crystals
  • Guidelines for selecting acoustic materials



INTENDED AUDIENCE :
Students and researchers in "Mechanical Engineering, Materials Engineering, Acoustics, Architecture"
PREREQUISITES          : Mathematics (up to Class 12th), Physics (up to Class 12th)
INDUSTRY SUPPORT  : ARCI, TATA Advanced Materials Limited, Huntsman Corporation, IACS, Materials Research Society of India (MRSI), Acoustic consultants, Advanced materials manufacturers, Speech transmission industry.

Learners enrolled: 452

SUMMARY

Course Status : Upcoming
Course Type : Elective
Duration : 8 weeks
Start Date : 27 Jan 2020
End Date : 20 Mar 2020
Exam Date : 29 Mar 2020
Enrollment Ends : 03 Feb 2020
Category :
  • Mechanical Engineering
  • Level : Undergraduate/Postgraduate
    This is an AICTE approved FDP course

    COURSE LAYOUT

    Week 1 : Acoustics fundamentals
           Sound propagation in fluids
    Week 2 : Advanced concepts in acoustics
    Sound signal analysis
    Principles of Noise control
    Week 3 : Acoustic materials
    Enclosures
    Barriers
    Absorbers
    Week 4 : Porous sound absorbers
    Panel absorbers
    Helmholtz resonators
    Perforated panel absorbers
    Week 5 : Micro-perforated panel absorbers
    Limitations of conventional acoustic materials
    Acoustic metamaterials
    Week 6 : Acoustic metamaterials
    Membrane type acoustic metamaterials
    Week 7 : Membrane type acoustic metamaterials
    Introduction to Sonic crystals
    Week 8 : Sonic crystals
    Guidelines for material selection

    BOOKS AND REFERENCES

    • David A. Bies, and Colin H. Hansen (2009), “Engineering Noise Control: Theory and practice”, Spon Press. 
    • M. J. Crocker (2007), “Introduction to Principles of Noise and Vibration Control”, in Handbook of Noise and Vibration Control, John Wiley and Sons Inc.

    INSTRUCTOR BIO

    Prof. Sneha Singh

    IIT Roorkee
    Hello, I am Dr. Sneha Singh, an Assistant Professor at MIED, IIT Roorkee. I have obtained my Ph.D. with highest honours from the University of Warwick in 2016 in the area of Automotive Sound Quality. I have obtained by B.Tech. (Honours) from IIT Kharagpur in Manufacturing Science and Engineering in 2011. I am an author of 6 international journal papers of high repute and 8 international conference papers. I thoroughly enjoy teaching and therefore I have gained good teaching experiences during my PhD, my post Doc at IIT Kharagpur & IIT Bombay, and as Assistant Professor at IIT Roorkee. I have taught courses on Automotive Engineering, Acoustics and Noise Control, Kinematics and Dynamics of machines, Theory of Machines and Machine Design, Theory of Production Processes, and Design for Safety & Comfort. Further I have been a guest lecturer at lecture series on Acoustics & Industrial Noise Control at GIAN-IIT Kharagpur. My video lectures are available online at https://www.youtube.com/watch?v=iqVYIq96tB4 Currently, I am pursuing research on Acoustic Metamaterials and I would love to deliver a state-of-the-art lectures on this topic.

    COURSE CERTIFICATE

    • The course is free to enroll and learn from. But if you want a certificate, you have to register and write the proctored exam conducted by us in person at any of the designated exam centres.
    • The exam is optional for a fee of Rs 1000/- (Rupees one thousand only).
    Date and Time of Exams: 29th March 2020, Morning session 9am to 12 noon; Afternoon Session 2pm to 5pm.
    • 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. If there are any changes, it will be mentioned then.
    • Please check the form for more details on the cities where the exams will be held, the conditions you agree to when you fill the form etc.

    CRITERIA TO GET A CERTIFICATE:
    • Average assignment score = 25% of average of best 6 assignments out of the total 8 assignments given in the course.
    • Exam score = 75% of the proctored certification exam score out of 100
    • Final score = Average assignment score + Exam score

    YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75.
    • If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.
    • 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 Roorkee. It will be e-verifiable at nptel.ac.in/noc.
    • Only the e-certificate will be made available. Hard copies will not be dispatched.

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