The following announcemnts have been contributed by Inland NW Regional Chapter members. If you want to make a contribution to this list, (Send Email to Michael Anderson). Events are listed in order of present to past.
EXPERIENCES OF AN INDUSTRIAL CONSULTANT OR HOW WE ALMOST CHANGED THE SOUND OF HARLEY
Dr. Joseph W. Sullivan, Ph.D., P.E.
Sullivan Consulting Services
Thursday, November 13, 1997
University of Idaho
Room 21 Janssen Engineering Building
3:30 P.M.
Abstract
This presentation includes interesting examples drawn from Dr. Sullivan's 14 years of experience as a self-employed consultant working on industrial engineering projects, many in the fields of acoustics and noise and vibration control. One particular example is the work that he is doing for Harley Davidson that has resulted in a mutually beneficial ``marriage" between Sullivan and Harley. In fact, his extensive design/development work on motorcycle mufflers has led others to conclude that Sullivan is responsible for the``sound of Harley". He is bringing several examples of his work -- actual motorcycle mufflers - for inspection/discussion during the presentation.
DESIGN OF INTAKE AND EXHAUST SILENCERS FOR MOTORCYCLES
Dr. Joseph W. Sullivan, Ph.D., P.E.
Sullivan Consulting Services
Linden, Indiana
Friday, November 14, 1997
University of Idaho
Engineering/Physics Bldg 214
3:30 P.M.
Abstract
Joe Sullivan's 26-year career as a designer of automobile mufflers began with his Ph.D. research on this topic at Purdue University. He is probably the foremost muffler designer in the U.S. today and currently has a long-term contract with Harley Davidson to design mufflers for their motorcycles. His work on this project has led others to conclude that Sullivan is responsible for the ``sound of Harley". This presentation includes details of modeling the intake and exhaust systems of motorcycles for purposes of designing mufflers to silence radiated noise. Many of the concepts employed by Dr. Sullivan, a mechanical engineer, should be familiar to EEs. These include, for example, two-port models of distributed-parameter systems (the exhaust pipes) with the input variables being sound pressure (analogous to AC voltage) and volume velocity (analogous to AC current). Thevenin's theorem is utilized to determine acoustical source impedance of the internal -combustion engine and image theory (well-know in EM) to analyze sound radiated by a monopole (the tailpipe exit) near a reflecting plane (the asphalt roadway). Also employed are well-known theories of constructive/destructive interference of interacting sound waves (similar to EM) and the treatment of muffler packing materials as acoustical resistance. These theories are complicated by the facts that the transmission medium (exhaust gas) is ``flowing" at different rates, has heterogeneous properties, and undergoes wide temperature swings. These complicating factors require that theories borrowed from the fields of thermodynamics, fluid mechanics, and heat transfer be employed.
The presentation will be video-taped. Members may check out the video tape upon request.
For more information contact:
Jeff Burnett
WSU SChool of Architecture
Pullman, Washington 99164-2220
(509) 335 1937
(509) 335 6132 FAX
jburnett@arch.wsu.edu
Time: Friday, March 7, 1997, 8:00 PM
Where: Spokane Washington
Directions: From I-5 take the Division Street exit north to
Euclid Ave. turning left one block to a "Y"
with Cora Street- take the right hand turn on
to Cora. The church is two blocks down on the
right.
The Church: The sanctuary seats about 900 and is designed in
a semi fan shape, on the long side. The sound
system design and installation was done by PKN
Designs and consists of a front cluser and four
delays 34 ft back from the main cluster, all speaker
components are EAW (?). The system in bi-amped
and is powered by Crown amplifiers supplying a total
of 4000 Watts to the main speaker system.
Questions: Contact David Lewis (pkndesigns@nidlink.com).