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Acoustic and Noise Control

Acoustic and Noise Control. Instructor: Dr. Abhijit Sarkar, Department of Mechanical Engineering, IIT Madras. 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. (from nptel.ac.in)

Lecture 25 - Muffler Analysis

Go to the Course Home or watch other lectures:

Lecture 01 - Introduction

Lecture 02 - Introduction (cont.)

Lecture 03 - Governing Equation

Lecture 04 - Governing Equation (cont.)

Lecture 05 - Plane Wave

Lecture 06 - Plane Wave (cont.)

Lecture 07 - Reflection of Plane Waves

Lecture 08 - Reflection of Plane Waves (cont.)

Lecture 09 - Frequency Analysis

Lecture 10 - Frequency Analysis (cont.)

Lecture 11 - Harmonic Plane Waves

Lecture 12 - Travelling and Standing Waves

Lecture 13 - Acoustic Mode Shapes, Reflection

Lecture 14 - Plane Waves: Reflection and Transmission

Lecture 15 - Flexural Waves, Evanescent Waves

Lecture 16 - Near Field Acoustic Waves

Lecture 17 - Cuton Waves in Duct

Lecture 18 - Power Calculation

Lecture 19 - Decibel Scale

Lecture 20 - Decibel Arithmetic

Lecture 21 - Sound Power Level

Lecture 22 - Human Factors in Acoustic Engineering

Lecture 23 - Microphone

Lecture 24 - Acoustic Measurements

Lecture 25 - Muffler Analysis

Lecture 26 - Transfer Matrix Method

Lecture 27 - Electromechanical Analogies

Lecture 28 - Electromechanical Analogies: Simple Example

Lecture 29 - Electromechanical Analogies: Example

Lecture 30 - Helmholtz Resonator

Lecture 31 - Source Impedance

Lecture 32 - Insertion Loss

Lecture 33 - Analysis of Industrial Mufflers

Lecture 34 - Spherical Waves

Lecture 35 - Monopole and Dipole

Lecture 36 - Inhomogeneous Wave Equation

Lecture 37 - Green's Function

Lecture 38 - Kirchhoff-Helmholtz Integral Equation

Lecture 39 - MATLAB Tutorial 1

Lecture 40 - MATLAB Tutorial 2

Lecture 41 - MATLAB Tutorial 3

Lecture 42 - MATLAB Tutorial 4