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Acoustics

Acoustics. Instructor: Prof. Nachiketa Tiwari, Department of Mechanical Engineering, IIT Kanpur. This course discusses topics in acoustics: acoustics fundamentals, terminology, 1-D wave equation in Cartesian coordinates and in spherical coordinates, transmission line equations, electromechanical transduction and mechano-acoustic transduction using lumped parameter approach, modeling of complex electro-magnetic-mechanical-acoustic systems, sound radiation, propagation and attenuation of sound, waveguides, and the interplay between vibrations and acoustics. (from nptel.ac.in)

Lecture 29 - Radiation Impedance (cont.)


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Concept Review
Lecture 01 - Introduction, Sound Wave vs Vibration, Different Types of Waves
Lecture 02 - Review: Linearity, Complex Numbers and Spring Mass System
Lecture 03 - Review: Poles and Zeros, Phase and Magnitude Plots, Transfer Functions, Bode Plots
Lecture 04 - Review: Transfer Function and Bode Plots
1-D Wave Equation
Lecture 05 - 1-D Wave Equation and its Solution
Lecture 06 - Solution for 1-D Wave Equation
Lecture 07 - Waveguides, Transmission Line Equations and Standing Waves
Lecture 08 - Waveguides, Transmission Line Equations and Standing Waves (cont.)
Lecture 09 - Examples of 1-D Waves in Tubes, Short tubes, Kundt's Tube
Lecture 10 - Thermodynamic Processes during Sound Transmission
Lecture 11 - Numerical Examples 1
Sound Transmission
Lecture 12 - Sound Transmission through Walls
Lecture 13 - Sound Transmission through Walls (cont.)
Lecture 14 - Leakage in Walls, Sound Transmission Class Ratings, Octave Bands
1-D Waves
Lecture 15 - Instantaneous Power Flow
Lecture 16 - Radial Propagation of Sound, Monopoles, and Dipoles
Lecture 17 - Radial Propagation of Sound, Monopoles, and Dipoles (cont.)
Lecture 18 - Radial Propagation of Sound, Monopoles, and Dipoles (cont.)
Lecture 19 - Numerical Examples 2
Lecture 20 - Numerical Examples 3
Directivity
Lecture 21 - Directivity: Expression of Pressure
Lecture 22 - Directivity of Different Sound Sources
Lecture 23 - Directivity Pattern associated with Sound Sources
Lecture 24 - Directivity Pattern associated with the Doublet
Lumped Parameter Modeling of Transducers
Lecture 25 - Generalized Elements
Lecture 26 - Examples of Electromechanical Systems
Lecture 27 - Transformers, Radiation Impedance, and Helmholtz Resonator
Lecture 28 - Radiation Impedance
Lecture 29 - Radiation Impedance (cont.)
Lecture 30 - Models of Electromechanical Acoustics System
Lecture 31 - Solution of Loudspeaker Model
Lecture 32 - Microphones
Lecture 33 - Vibrometer, Seismometer, Accelerometer, Shaker Table
Sound in Public Spaces and Noise Management
Lecture 34 - Sound Propagation in Rooms, 1-D Rooms, 2-D Rooms
Lecture 35 - Sound in 3D Rooms
Lecture 36 - Absorption Coefficient, and Irregular Rooms
Lecture 37 - Room Constant, and Sabine's Coefficient
Lecture 38 - Design of a muffler
Lecture 39 - Noise in Machines, Basics of Noise Management