Chronology | Current Month | Current Thread | Current Date |
[Year List] [Month List (current year)] | [Date Index] [Thread Index] | [Thread Prev] [Thread Next] | [Date Prev] [Date Next] |
----------------------------------------------------------------------
Message: 1
Date: Wed, 16 Apr 2008 09:30:48 -0700
From: Roger Haar <haar@physics.arizona.edu>
Subject: Re: [Phys-l] harmonics
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Message-ID: <480629B8.9060900@physics.arizona.edu>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi,
I have been told that the situation is complicated by the flared end on
the brass instruments. Crudely, sound waves decouple from the flared
about when the diameter of the horn is about a wavelength. Higher
frequencies decouple at a smaller diameter and thus a shorter tube which
results in a shorter wavelength and a higher frequency. Thus the
"harmonic frequencies" are not exactly integer multiples of the
fundamental. I was told this produces the characteristic "bright" sound
of the brass horns.
Hopefully my source was not wrong about this.
Thanks,
Roger Haar
U of AZ physics
*******************************************
Anthony Lapinski wrote:
In teaching about sound, I am looking for a list of instruments and all
the harmonics they produce. I know the harmonics determine the quality of
sound from a musical instrument. Does anyone have or know of a good
website/reference/table/book that shows all the instruments, which
harmonics are present, and their relative magnitude?
_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l
------------------------------
Message: 2
Date: Wed, 16 Apr 2008 11:03:26 -0700
From: Leigh Palmer <palmer@sfu.ca>
Subject: Re: [Phys-l] harmonics
To: phys-l@carnot.physics.buffalo.edu
Message-ID: <024084FC-6F62-4998-96F1-C9C05F35CA90@sfu.ca>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Thanks to John Denker for that UNSW physics of music site. It looks
like it has lots of useful and interesting stuff. I taught the physics
of music at SFU in the seventies and eighties with great pleasure, and
I have recommended this site to the professor who is teaching it now.
A book that the teacher of such a course should have on the shelf is
"Music, Physics and Engineering" by Harry F. Olson*. Some of the
material is out of date, and that doesn't surprise me since the photo
of the cover looks exactly like my copy, less the $4.00 pricetag. The
fact that this book is still in print more than forty years after its
second edition attests well to its quality and utility.
Let me also add a note here about the use of the term "harmonics". I
discontinued my own practice of using that term as a noun, and using
instead the more general term "overtone". This practice avoids the
confusion that may arise from using the two nouns somewhat
interchangeably. Thus I try to say "harmonic overtones" instead of the
common abbreviation "harmonics" that is heard in a musical context.
Leigh
*<http://www.amazon.com/Music-Physics-Engineering-Harry-Olson/dp/0486217698/ref=sr_1_1?ie=UTF8&s=books&qid=1208365518&sr=8-1
>
------------------------------
Message: 3
Date: Thu, 17 Apr 2008 11:25:37 -0400
From: Calvin Kalman <Calvin.Kalman@CONCORDIA.CA>
Subject: Re: [Phys-l] Physics Education Research
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Message-ID: <a06240803c42d1b36c41f@[132.205.18.31]>
Content-Type: text/plain; charset="us-ascii" ; format="flowed"
At 3:00 PM -0700 4/3/08, Richard Hake wrote:
*******************************************
ABSTRACT: High school teacher Ed Eckel complained in a PhysLrnR post
about the $149 price of the 2008 hard copy edition of Calvin Kalman's
book "Successful Science and Engineering Teaching. . . ." Kalman
responded that the 2007 paperback edition is only $30. A recent
PhySoc post by Art Hobson indicates a possible way to lower textbook
prices - authors can follow his example and complain to the
publisher - but the results of Art's complaint do not seem to have
had an effect on prices quoted online for Hobson's book "Physics:
Concepts & Connections." Joe Redish has outdone Hobson in lowering
book prices by placing "Teaching Physics With the Physics Suite"
[Redish (2003)] online and FREE to all! Paraphrasing Redish "Will
web documents with interactivity lead to textbooks just withering
away, despite their apparent current vitality?"
*******************************************
The price has been reduced
Amazon.com (US)has it at a 20% discount
http://tinyurl.com/5xyfhq
and Canadian colleagues can save 36% at Amazon.ca:
http://tinyurl.com/62uv4n
--
Best wishes
Calvin
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
_/ Calvin S. Kalman, P. Phys. Phone: (514) 848-2424 xt 3284
_/ Professor,Department of Physics Fax: (514) 848-2828
_/ Fellow, Science College
_/ Member, Centre for the Study of Learning and Performance
_/ Concordia University
_/ Montreal, QC H4B 1R6 Calvin.Kalman@concordia.ca
_/
_/ Also Adjunct Professor Department of Educational
_/ and Counseling Psychology, McGill University, Montreal, Quebec
_/
_/
_/ homepage- http://physics.concordia.ca/faculty/kalman.html
_/
_/ Buy
_/ Successful Science and Engineering Teaching in Colleges and Universities
_/ at
_/ http://www.josseybass.com/WileyCDA/WileyTitle/productCd-1933371161.html
_/ A Review of this book is found in Journal of Chemical Education Oct. 2007:
_/ http://tinyurl.com/2rt7tj
_/ For the research behind this book buy:
_/ "Successful Science and Engineering Teaching: Theoretical and Learning
_/ Perspectives (Innovation and Change in Professional Education)"
_/ at
_/ http://tinyurl.com/3qn237
_/
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_//_/_/
------------------------------
_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l
End of Phys-l Digest, Vol 39, Issue 22
**************************************