Muffler Acoustics - Application to Automotive Exhaust Noise Control
Get the know-how of noise control applications by pursuing the certification of Muffler Acoustics - Application To Automotive Exhaust Noise Control by Swayam.
Online
12 Weeks
Free Quick Facts
| Medium Of Instructions | Mode Of Learning | Mode Of Delivery |
|---|---|---|
| English | Self Study | Video and Text Based |
Course Overview
The Muffler Acoustics - Application To Automotive Exhaust Noise Control certification is an NPTEL course and aims to impart knowledge about the theory of exhaust mufflers used in the field of engineering noise control. The programme is made for undergraduates as well as postgraduates and is offered to the students by IIT, Kanpur. The course includes the fundamentals as well as a detailed explanation of the topics. Candidates who prefer to choose the Muffler Acoustics - Application To Automotive Exhaust Noise Control programme get informed about 3-D acoustic fields, different terminologies, acoustic filters, etc.
Participants will learn about 12 different chapters over a period of 12 weeks. Students are free to consume more time in completing the Muffler Acoustics - Application To Automotive Exhaust Noise Control certification syllabus than the given time. The course is provided in online mode without any payment and requires no particular time to be spared for the course. It is upon the wish of the students to attend the classes or video lectures. The programme also offers certification to the candidates. The certification can be achieved through an exam and registration fees. Students can join the Muffler Acoustics - Application To Automotive Exhaust Noise Control training at any time according to their requirements and pursue the same accordingly as it is a self-paced course.
The Highlights
- Self-paced training
- Free programme
- Online programme
- Certification available
- Provided by IIT, Kanpur
- NPTEL course
- AICTE approved
- 12 weeks duration
Programme Offerings
- Quiz
- test
- Discussion
- video lectures
- audio lectures
- assignments
- references
- Books.
Courses and Certificate Fees
| Fees Informations | Certificate Availability | Certificate Providing Authority |
|---|---|---|
| INR 1000 | yes | IIT Kanpur |
- The course can be joined by the students without going through any payment process.
- The certification for the programme can be achieved through the payment of the quoted amount of Rs. 1,000 as Muffler Acoustics - Application To Automotive Exhaust Noise Control fees followed by an exam.
Muffler Acoustics - Application To Automotive Exhaust Noise Control Fees details -
Heads | Amount in Rupees |
Exam fees | Rs.1,000 |
Programme fee | Free |
Eligibility Criteria
Education
Candidates should have basic knowledge of mechanical vibrations and engineering acoustic mathematics.
Certification Qualifying Details
Students who want to achieve a certificate for the Muffler Acoustics - Application To Automotive Exhaust Noise Control programme must get at least 40 marks in the exam conducted by the creator in offline mode. Candidates can be a part of the exam by paying the exam fees.
What you will learn
Candidates will learn the following aspects while pursuing this programme:
- Candidates will know about the fundamentals of mufflers for controlling noise emissions.
- Participants will acquire knowledge about frequencies of normal and transverse modes.
- Learners will understand units for the measurement of sound as well as the intensity in the Muffler Acoustics - Application To Automotive Exhaust Noise Control certification syllabus.
- Students will acquire knowledge about outlet and inlet acoustic, end inlet, side outlet, etc. power relations in the course.
- Participants will gain insights into Webster's horn equation, numerical approaches, and analytical solutions.
- Learners will get to know about aeroacoustic state variables, extended tube elements, etc.
- Candidates will learn about contraction and expansion, uniform piston drive models in the Muffler Acoustics - Application To Automotive Exhaust Noise Control certification online course.
- Participants will gain practical information on muffler design with examples.
- Candidates will acquire knowledge about experimental techniques of impedance tubes.
Who it is for
Following participants are suitable for the particular programme :
- Candidates who are already informed about mechanical vibrations and engineering mathematics and a fundamental course in acoustics.
- Working professionals
Admission Details
Participants who wish to enrol in Muffler Acoustics - Application To Automotive Exhaust Noise Control certification course must follow the below-mentioned steps:
Step 1- Candidates can go to the direct link - https://onlinecourses.nptel.ac.in/noc21_me33/preview
Note- Further steps for the admission process can not be provided right now due to the lack of availability of the join course tab on the website.
The Syllabus
- Mufflers for controlling noise emission from internal combustion engines: Overview & Motivation
- Development of the one-dimensional acoustic equation: Planar wave propagation in a duct with/without uniform mean flow
- Sound speed
- Boundary conditions
- Free-response (transient signals) and forced-response (continuous time signals)
- Progressive and standing waves
- Resonance frequencies of a closed/open-ended uniform duct
- Rectangular and circular waveguides (ducts)
- Hard-wall ducts - Normal modes and resonance frequencies of transverse modes
- Concept of cut-on and cut-off frequency
- Evanescent modes
- Solutions including the convective effect of uniform mean flow
- Waveguides with compliant walls: Soft-wall modes in rectangular and circular dissipative ducts with local/bulk reacting lining
- Units for measurement of sound and intensity
- Sound Pressure Level
- Intensity Level
- Sound Power Level
- Impedance: Acoustic impedance
- Specific (characteristic) acoustic impedance and Mechanical impedance
- Impedance at a section of a 1-D uniform tube
- Radiation impedance
- Lumped system analysis
- Impedance of an Orifice or a Short Narrow Duct
- End-correction for an open-ended tube in an un-flanged/flanged baffle
- Impedance of a large Volume (Capacitance)
- Electro-acoustic analogies (Kirchhoff’s laws) and electrical circuit representation of an acoustic filter (exhaust) system: Thevenin and Norton forms
- Side-branch resonators such as Helmholtz resonators
- Quarter-wave resonators
- Extended-tube resonators
- Concentric Hole-Cavity Resonators
- Acoustical Filter Performance: Transmission Loss
- Insertion Loss and Level Difference
- Simple (sudden) area discontinuity such as inlet and outlet and acoustic power relations
- Simple Expansion chambers of uniform cross-section without and with tube extensions
- End-inlet and side-outlet
- Side-Inlet and Side-Outlet system
- Transfer [T] matrix modelling of acoustic filter elements including lumped elements
- Cascading of mufflers (filters): Overall transfer-matrix of the system
- Evaluation of four-pole or transfer [T] matrix parameters
- Expression for Transmission Loss (TL) in terms of the four-pole parameters
- TL graphs of simple muffler systems
- Webster’s Horn equation: Conical, hyperbolic, parabolic and exponential ducts
- Analytical solution and numerical approaches such as stepped-segmentation and Matrizant method
- Transfer matrix modelling and TL performance
- Aeroacoustic state variables
- Transfer matrices of tubular elements
- Extended-tube elements
- Simple area discontinuity
- Perforated Elements with Two-Interacting ducts: Concentric-tube resonators
- Cross-flow expansion and contraction elements
- Conical-concentric tube resonator (Matrizant analysis)
- Perforated elements with three-interacting ducts
- Commercially used perforated duct mufflers
- Acoustic impedance of perforates
- Herschel-Quincke tubes
- Perforated elements with several interacting ducts: Three-pass double reversal chambers
- Muffler with non-overlapping perforated ducts and a baffle
- Impedance [Z] matrix: Characterization of multi-port elements
- Single-inlet and double-outlet systems
- Evaluation of TL performance in [Z] matrix parameters
- Sudden-area (expansion and contraction) discontinuities: Continuity of acoustic pressure and velocity fields
- Rectangular and Circular Cylindrical Geometries Derivation of a Green’s function solution: Point-source representation of a portacoustic pressure response or Transfer functions
- Uniform piston-drive model: Modelling of ports as rigid oscillating pistons
- Characterization of a single-inlet and single-outlet/double-outlet muffler in terms of [Z] or [T] matrix: Simple-expansion chamber, flow-reversal, end-inlet and side-outlet, side-inlet and side-outlet muffler configurations
- Comparison of TL performance obtained using the Point-Source and the Uniform piston-driven model
- Some parametric studies
- Analytical mode-matching (AMM) approach
- Computation of TL performance 7 derivation of the four-pole parameters Circular Cylindrical muffler configuration with an extended-inlet and extended-outlet without/with concentric perforated bridging tube
- Large (industrial) muffler configurations
- Brief overview of Finite Element (FE) analysis of mufflers: Use of commercial software
- Comparison of results obtained from analytical and FE models
- Self-study: Analysis of large circular muffler with side port(s)
- Acoustically lined Rectangular and Circular Ducts with a Moving medium
- Transfer matrix relation for a Dissipative Duct
- Transverse Wave numbers (stationary medium)
- Normal Impedance of the lining
- Transmission Loss Performance of Lined Duct Silencers and Bends
- Parallel Baffle Mufflers
- Plenum Chambers
- Flow-generated noise
- Terminologies based on the ASTM standard
- Detailed construction of the impedance tube and microphone spacing consideration
- Microphone calibration Impedance of a passive termination: The Probe-Tube (single microphone) method
- Two-Microphone and Transfer Function Methods
- Four-pole parameters of a muffler system incorporating mean flow effect: Two-source location method, Two-Load method
- Comparison of the two methods Discussion on experimental and numerical/analytical results
- Requirements & Practical considerations of an Engine Exhaust Muffler
- Straight-through reactive perforated mufflers with double-tuned neck extensions at inlet and outlet
- Dual-chamber and plug-mufflers
- Combination or Hybrid mufflers with neck extensions - for high-pressure gas exhaust applications
- Mufflers with side-port(s)
- Design of short elliptical end-chambers
- Design for Insertion Loss
- Back-pressure considerations
- Design for quieting air-conditioning or ventilation systems
Instructors
IIT Kanpur Frequently Asked Questions (FAQ's)
Candidates can directly join the course from the official website of the programme.
The course includes case studies and practical examples which helps the students gain practical insights on the topic.
Yes, the course provides discussion groups to the students.
The registration for the exam can only be done through a unique URL which will be announced on the website.
The course will be available throughout the year. Candidates can apply for the course at any given point in time.
Swayam provides enough courses to choose from for all its students. Candidates can go through the description of the programme and choose as per their requirements.
No, this course is not equivalent to the university-level credit since it is provided online.
Yes, candidates must pay the exam fees to avail the certificate for the programme.
The platform asks for the personal details of the students in order to contact and notify them about the details, if necessary.
The course is provided by the Indian Institute of Technology, Kanpur.