ME413/513
Engineering Acoustics
(3 credits)
General Information
Instructor: Mike Anderson
Office: Engineering Physics 324O
Phone: 885-7432
Email: Internet anderson@uidaho.edu
Course Time: MWF 11:30AM-12:20 PM
Course Location: JEB 26
Office Hours: To be determined
Course Web Page: http://calvin.engr.uidaho.edu/~anderson/me413.htm
Text: Fundamentals of Acoustics, Lawrence E. Kinsler, Austin R. Frey, Alan B. Coppens,
James V. Sanders, Fourth Edition, John Wiley and Sons, 2000.
Computer Usage: Matlab will be used
extensively in the course. Matlab is available in UI
PC Laboratories, and individual copies can be purchased at an academic price
from the UI bookstore.
Topics, You Will Learn...
- How to use impedances to
model electrical and mechanical systems;
- How to use impedances to
compute power dissipation in electrical and mechanical models;
- How to model electromagnetic
loudspeaker drivers
- How to design simple passive
filters,
- About the physical quantities
that describe the propagation of acoustic waves in fluids, density,
velocity, temperature and pressure;
- About the physical basis for
the derivation of the wave equation used to model propagation of acoustic
waves in fluids;
- About the fundamental
solution of the wave equation, D'Almberts
solution, that shows how acoustic waves propagate at the speed of sound;
- How to estimate the effect of
ambient conditions on the speed of sound in gasses;
- How to specify constant frequency
acoustic waves, and to interpret concept of wavelength;
- How to use the most common
steady state models for sound propagation, plane and spherical waves;
- About the scientific measures
of acoustics, intensity and Sound Pressure Level (SPL in decibels).
- How to use a microphone to
make acoustic measurements, microphone interaction with the sound field,
calibration charts, pressure and free field sensitivites,
free field correction factor;
- How to decompose an acoustic
signal into frequency components with the Fast Fourier Transform (FFT);
- How to apply a weighting
scale (such as the A scale), to an acoustic signal;
- How acoustic waves are
propagated across a boundary between two substances;
- How acoustic waves are
propagated through a layer;
- How to design acoustic layers
to block or enhance acoustic energy transport from one substance to
another;
- How acoustic waves are used
to perform NonDestructive Testing (NDT); A, B
and C scans.
- About the physics of the
simplest acoustic source, the monopole;
- How and when to model
"complex" sources as simple monopoles;
- Physics and modeling of
dipole sources;
- About the physics of the most
common acoustic source, the plane piston radiator (used to model acoustic
transducers), on axis response, far field distance, beam pattern in the
far field;
- How to incorporate the plane
piston model into acousto/mechanical/electrical
models of transducers;
- How to use the plane piston
model to compute the acoustic power output of transducers;
- How and when to apply the
lumped parameter Helmholtz resonator model to
acoustic systems for evaluation and design;
- Properties of the Helmholtz resonator model, frequency response,
resonance frequency and Q;
- How to model an
electromagnetic acoustic driver (e.g., a loudspeaker, this is the same
model as for a servomotor or electromagnetic shaker);
- How to model and design a
sealed cabinet loudspeaker.
Homework, Exams, and Design Project
Exams: There will be three exams, and a final
Homework: Homework assignments will be given during the course.
Design Project: A design project will be required. Students taking
ME513 will be required to complete a design project of higher sophistication
that those required of ME413 students.
Grading
|
Item
|
Grade
Percentage
|
|
Exams
|
20% each
|
|
Design Problem
|
10%
|
|
Final Exam
|
30%
|