ME413/513 Lecture Topics and Notes
Last Updated May 1 2008
The notes contained in this page correspond to the delivery of ME413/513 during
Spring Semester 2008. The content of ME413/513 changes slightly from semester
to semester. Lecture notes from previous semesters
[
Spring 02
|
Spring 04
|
Spring 06
]. An advanced topics version of ME413/513 was offered
Spring 05.
Introduction (HW#1,2 Coverage)
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Session 1: Introduction, Complex Numbers
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Session 2: Using Complex Numbers to Solve Differential Equations
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Session 3: Analysis of Electric Circuits, Electromechanical Analogies
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Session 4: Power Dissipation, Properties of a 2nd Order Oscillator
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Session 5: Electromagnetic Loudspeaker Drivers,
Specifications for 4.5" Full Range Driver
Fundamentals of Acoustics in Fluids (HW#3 Coverage)
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Session 6: Acoustic Variables, Fluid Conservation Equations
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Session 7: Wave Equation in Fluids, D'Almberts Solution
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Session 8: Harmonic Plane Waves, Wavelength
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Session 9: Complex Exponential Notation, Acoustic Velocity
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Session 10: Acoustic Velocity, Displacement, Density
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Session 11: Decibel Scales, Specific Acoustic Impedance
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Session 12: Acoustic Intensity, Power
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Session 13: Spherical Waves, Acoustic Pressure, Velocity and Displacement
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Session 14: Spherical Waves, Acoustic Intensity, Power; Example Problems
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Session 17: Review for Exam I
Reflection and Transmission at an Interface (HW#5 Coverage)
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Session 15: Example Problems, Reflection/Transmission at a Planar Interface
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Session 16: Reflection/Transmission at a Planar Interface
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Session 18: Reflection/Transmission Through a Planar Layer,
Transmission at Normal Incidence
Sources of Sound (HW#6 Coverage)
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Session 19: Monopoles and Source Strength.
In slide 19-5, the formula for time averaged power "PI" should contain a 4*pi*a^2 multiplier.
Errata discussed in Session 29 DVD.
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Session 20: Simple Sources and Dipoles
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Session 21: Method of Images
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Session 22: Plane Piston- On Axis Response
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Session 23: Plane Piston- Farfield Response,
BeamPatternV11.mcd,
BeamPatternV11.pdf.
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Session 24: Plane Piston- Radiation Impedance,
RadImpFunctions.pdf,
RadImpFunctionsV2001.mcd. In slide 24-3, the
displacement x should be the integral of velocity u, not the other way around. Errata discussed
in Session 29 DVD.
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Session 25: Plane Piston- Sound Power Output
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Session 29: Review for Exam II
Pipes and Helmholtz Resonators (HW#7, Project Coverage)
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Session 26: Rigidly Terminated and Pressure Release Narrow Pipe
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Session 27: Acoustic Impedance, Area Change
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Session 28: Arbitrary Length Pipes, Impedance Transfer Formula,
Low Pass Example Calculation,
MathCAD Source for Pipes and Muffler Computations.
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Session 30: Radiation From an Open Pipe,
Open Pipe/Low Pass Example Calculations.
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Session 31: Branches,
Example Branch Calculations.
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Session 32: Helmholtz Resonators
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Session 33: Helmholtz Resonator Applications- Low Pass and Bandstop Filters
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Session 34: Helmholtz Resonator Applications- Sealed Loudspeaker Cabinet Design
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Session 35: Helmholtz Resonator Applications- Ported Loudspeaker Cabinet Design,
Notes on Design of Vented Cabinets
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Session 39: Review for Exam III.
Sound Measurement and Weighting Scales (HW#4 Coverage)
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Session 36: Physics of Sound Measurement, Microphone Calibration Charts,
Cal Chart for BK4133 Mic,
Cal Chart for BK4134 Mic,
Cal Chart for BK4138 Mic,
Cal Chart for ACO7016 Mic.
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Session 37: Free-Field Correction Factor, Weighting Scales,
Free-Field Correction Factors,
Formula for A-Weight Scale.
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Session 38: Frequency Decomposition with DFT,
FrequencyDecomposition.
MathCAD and
Matlab examples for FFT decomposition of time series data.
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Session 40: Parseval's Theorem, DFT Details
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Session 41: Wide-band Sound Measurement by Spectral Method ,
WideBandSoundMeasurement.
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Session 42: Review for Final Exam