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Re: [Phys-l] musical instruments



Hi

I haven't had time to follow all of the posts on instruments but the two favorite YouTube videos of students in my intro to sound class are:

Chladni plate:
http://www.youtube.com/watch?v=Zkox6niJ1Wc
Breaking glass with voice:
http://www.youtube.com/watch?v=fbfjcEzFN2U

kyle
________________________________________
From: phys-l-bounces@carnot.physics.buffalo.edu [phys-l-bounces@carnot.physics.buffalo.edu] On Behalf Of phys-l-request@carnot.physics.buffalo.edu [phys-l-request@carnot.physics.buffalo.edu]
Sent: Thursday, April 08, 2010 12:00 PM
To: phys-l@carnot.physics.buffalo.edu
Subject: Phys-l Digest, Vol 63, Issue 6

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Today's Topics:

1. Re: musical instruments (Ricca, Bernard P)
2. Re: musical instruments (Brian Whatcott)
3. Re: musical instruments (Marc "Zeke" Kossover)
4. Re: musical instruments (Bill Nettles)
5. Re: musical instruments (chuck britton)
6. Re: musical instruments (Edmiston, Mike)
7. Re: musical instruments (John Clement)
8. Re: musical instruments (curtis osterhoudt)
9. Re: musical instruments (Bill Nettles)
10. Re: musical instruments (Bernard Cleyet)
11. Re: musical instruments (John Clement)
12. Re: musical instruments (Bernard Cleyet)
13. Re: Multiple Choice Exam Questions #2 (Richard Hake)
14. Re: musical instruments (Robert Yeend)
15. standing waves in exhaust? (David Strasburger-fac)
16. Re: standing waves in exhaust? (curtis osterhoudt)
17. Re: musical instruments (Michael Meyer)


----------------------------------------------------------------------

Message: 1
Date: Wed, 7 Apr 2010 12:26:13 -0400
From: "Ricca, Bernard P" <bricca@sjfc.edu>
Subject: Re: [Phys-l] musical instruments
To: <phys-l@carnot.physics.buffalo.edu>
Message-ID:
<859A2F4DF6D81A45955B39D50C025C085F0973@mail2.academia.sjfc.edu>
Content-Type: text/plain; charset="iso-8859-1"

Mike,

---- snip ----
Not having built any brass instruments myself, I am just guessing that early instrument manufactures had to experimentally determine the correct flare to make an instrument that could be played in tune. At instrument manufacturing/design companies today, I do not know if the proper flare is theoretically calculated, or if it is experimentally determined. Does anyone on this list know?

---- snip ----

The answer is "both". The flare serves more than one purpose, and, IIRC (my notes are not easily accessible, and it has been several years since I paid attention to this) you can determine some theoretical shapes (e.g., a "Bessel" flare) that, to a first approximation, are pretty good for the generation of a harmonic series. These are then tuned experimentally to account for curved tubing, desired tone, etc.

Barney

Bernard Ricca, Ph.D.
Director, Graduate Program in Math, Science and Technology Education
Department of Mathematical and Computing Sciences
Saint John Fisher College
3690 East Avenue
Rochester, NY 14618
585-899-3866 (Office)
585-899-3872 (FAX)
bricca@sjfc.edu


------------------------------

Message: 2
Date: Wed, 07 Apr 2010 11:50:12 -0500
From: Brian Whatcott <betwys1@sbcglobal.net>
Subject: Re: [Phys-l] musical instruments
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Message-ID: <4BBCB7C4.1050201@sbcglobal.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Of the instruments mentioned in Mike's note, the trombone seems specially
well suited to the task - in that a differential measurement of length
versus
frequency can be measured at several extensions, which would help
subdue one
or two effects that he mentioned - the displaced antinode, the bell mouth
acoustic impedance change etc.,

Brian W
Edmiston, Mike wrote:
One source is Thomas D. Rossing's book: The Science of Sound.

In the chapter on brass instruments he lists...

Trumpet 140 cm
French horn 375 cm
Trombone 275 cm
Tuba 536 cm
Baritone 264 cm.

/snip/
Michael D. Edmiston, Ph.D.
Behalf Of Anthony Lapinski
For my upcoming Sound topic, I am wanting a list of the LENGTHS of brass
instruments (bugle, trumpet, trombone, tuba, and French horn). I've
searched online with not much success. Does anyone know of a good source
for this information?



------------------------------

Message: 3
Date: Wed, 7 Apr 2010 10:36:36 -0700 (PDT)
From: "Marc \"Zeke\" Kossover" <zeke_kossover@yahoo.com>
Subject: Re: [Phys-l] musical instruments
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Message-ID: <770149.31099.qm@web53408.mail.re2.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1

Ever just got lost on a website, looking up after being mesmerized and realizing that hours have past?

That's what happens to me at the Musical Acoustics website at the University of New South Wales. This section here http://www.phys.unsw.edu.au/jw/brassacoustics.html has enough about the brass instruments (with musical samples) to give both a broad and deep understanding of what's going on.

Marc "Zeke" Kossover

?
----- Original Message ----
From: Anthony Lapinski <Anthony_Lapinski@pds.org>
To: phys-l@carnot.physics.buffalo.edu
Sent: Wed, April 7, 2010 5:35:23 AM
Subject: [Phys-l] musical instruments

For my upcoming Sound topic, I am wanting a list of the LENGTHS of
brass
instruments (bugle, trumpet, trombone, tuba, and French horn).
I've
searched online with not much success. Does anyone know of a good
source
for this
information?

_______________________________________________
Forum for
Physics Educators
href="mailto:Phys-l@carnot.physics.buffalo.edu";>Phys-l@carnot.physics.buffalo.edu
href="https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l"; target=_blank
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l





------------------------------

Message: 4
Date: Wed, 7 Apr 2010 12:39:28 -0500
From: Bill Nettles <bnettles@uu.edu>
Subject: Re: [Phys-l] musical instruments
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Message-ID: <1C09EC0F89D13543BECD14FBACC5344701617CA0EB@exmbox.uu.edu>
Content-Type: text/plain; charset="us-ascii"

Fletcher and Rossing in _The Physics of Musical Instruments_ give you more analysis of flares of musical instruments than a musician (and most physics teachers) would want. He talks about the Bessel flare and flare parameters, radiation patterns, intonation, anharmonicity of overtones, etc. It's almost reductionistic beyond artistry. It does help you understand why professional level instruments that play well are so expensive. All the individual parameters (mouthpiece volume and taper, tubing diameter, flare of bell, tubing bend radii, etc) interact, so constructing a well-playing wind-powered instrument is a work of artistry and experience. In the woodwinds, you have the edge shaping of the tone holes to consider also; the edge shape affects intonations and strengths of overtones.

A fun exercise is to get a brass mouthpiece and some straight tubing on the order of a meter and try to play it. Then fashion a bell (or use a medium sized funnel) on the end and play again. Check the ease of playing and the overtone structure of each setup and compare. It's amazing what the flared bell does.


Bill Nettles
Union University

-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-bounces@carnot.physics.buffalo.edu] On Behalf Of Ricca, Bernard P
Sent: Wednesday, April 07, 2010 11:26 AM
To: phys-l@carnot.physics.buffalo.edu
Subject: Re: [Phys-l] musical instruments

Mike,

---- snip ----
Not having built any brass instruments myself, I am just guessing that early instrument manufactures had to experimentally determine the correct flare to make an instrument that could be played in tune. At instrument manufacturing/design companies today, I do not know if the proper flare is theoretically calculated, or if it is experimentally determined. Does anyone on this list know?

---- snip ----

The answer is "both". The flare serves more than one purpose, and, IIRC (my notes are not easily accessible, and it has been several years since I paid attention to this) you can determine some theoretical shapes (e.g., a "Bessel" flare) that, to a first approximation, are pretty good for the generation of a harmonic series. These are then tuned experimentally to account for curved tubing, desired tone, etc.

Barney

Bernard Ricca, Ph.D.
Director, Graduate Program in Math, Science and Technology Education Department of Mathematical and Computing Sciences Saint John Fisher College 3690 East Avenue Rochester, NY 14618
585-899-3866 (Office)
585-899-3872 (FAX)
bricca@sjfc.edu



------------------------------

Message: 5
Date: Wed, 07 Apr 2010 14:11:12 -0400
From: chuck britton <cvbritton@mac.com>
Subject: Re: [Phys-l] musical instruments
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Message-ID: <a0624084bc7e27a1d5172@[192.168.1.100]>
Content-Type: text/plain; charset=us-ascii; format=flowed

Many a-time have I used a 10 ft length of electrical conduit to show
how bugle calls can be massacred.
Never tried a mouthpiece, never tried a flared bell.
Either of these additions might make it a way more pleasant listening
experience.

So many new things to try.

Hard-drawn 3/4 " copper water line works too.

At 12:39 PM -0500 4/7/10, Bill Nettles wrote:

A fun exercise is to get a brass mouthpiece and some straight tubing
on the order of a meter and try to play it. Then fashion a bell (or
use a medium sized funnel) on the end and play again. Check the ease
of playing and the overtone structure of each setup and compare.
It's amazing what the flared bell does.


------------------------------

Message: 6
Date: Wed, 7 Apr 2010 14:58:32 -0400
From: "Edmiston, Mike" <edmiston@bluffton.edu>
Subject: Re: [Phys-l] musical instruments
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Message-ID:
<5FB9F2E7A42745418A96DF9DDAB746E91DF36E4F@webmail.bluffton.edu>
Content-Type: text/plain; charset="us-ascii"

If you happened to watch "Note by Note: The Making of Steinway L1037" on PBS TV, you realize that each top-notch grand piano is built significantly by hand, and adjusted by hand, and has its own personality. When buying such a piano, or when a concert pianist is not transporting his or her own personal piano, the musician tries several and perhaps many instruments before selecting "the one." I did this when I bought my Yamaha C7B (7'4" grand piano). That was a very significant investment, and there was no way I would buy such a piano without playing it for a while.

On the other hand, none of my trumpets were handpicked. My relations with trumpets began in 5th grade with a Conn Director, and changed to a Conn Constellation in high school and for college. When I bought my son a Bach Strad I also bought myself Yamaha YTR-6335S. These are both considered "professional trumpets" although not "top-end" professional trumpets. A few years later, after playing both mine and my son's, my daughter asked for her own Yamaha. This means that at one time I had 5 trumpets in my house, and two of them were "identical" Yamaha YTR-6335S.

All of these trumpets were different to play. The Yamaha's were the closest to each other, but still different. Although all five of these were a moderate financial investment at the time I bought them, it did not seem at the time that it was worthwhile to go to a store having several so that I could hand pick "the one." I sometimes wonder if I should have done that. A former trumpet professor here at Bluffton said he would definitely hand pick a trumpet costing over $2000, and maybe even if it were a $1000 investment, because his experience was that most manufacturers had a fair amount of variance in their horns. He also said that his experience with Yamaha trumpets was that they did not vary as much, although they do vary some.

Thus, Barney's comment (below) seems appropriate from my experience.

Michael D. Edmiston, Ph.D.
Professor of Chemistry and Physics
Bluffton University
Bluffton, OH 45817
(419)-358-3270
edmiston@bluffton.edu



-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-bounces@carnot.physics.buffalo.edu] On Behalf Of Ricca, Bernard P
Sent: Wednesday, April 07, 2010 12:26 PM
To: phys-l@carnot.physics.buffalo.edu
Subject: Re: [Phys-l] musical instruments

Mike,

---- snip ----
Not having built any brass instruments myself, I am just guessing that early instrument manufactures had to experimentally determine the correct flare to make an instrument that could be played in tune. At instrument manufacturing/design companies today, I do not know if the proper flare is theoretically calculated, or if it is experimentally determined. Does anyone on this list know?

---- snip ----

The answer is "both". The flare serves more than one purpose, and, IIRC (my notes are not easily accessible, and it has been several years since I paid attention to this) you can determine some theoretical shapes (e.g., a "Bessel" flare) that, to a first approximation, are pretty good for the generation of a harmonic series. These are then tuned experimentally to account for curved tubing, desired tone, etc.

Barney

Bernard Ricca, Ph.D.
Director, Graduate Program in Math, Science and Technology Education Department of Mathematical and Computing Sciences Saint John Fisher College 3690 East Avenue Rochester, NY 14618
585-899-3866 (Office)
585-899-3872 (FAX)
bricca@sjfc.edu



------------------------------

Message: 7
Date: Wed, 7 Apr 2010 14:21:15 -0500
From: "John Clement" <clement@hal-pc.org>
Subject: Re: [Phys-l] musical instruments
To: "'Forum for Physics Educators'"
<phys-l@carnot.physics.buffalo.edu>
Message-ID: <92BADF23281345CE818CCD5069939525@ClementPC>
Content-Type: text/plain; charset="us-ascii"

But of course superb players can play on anything. Dennis Brain played a
Mozart concerto on a green garden hose. He used a mouthpiece, but I don't
recall whether he had an improvised bell. There may be a picture of him
doing it! He even trilled at the end.

John M. Clement
Houston, TX


Many a-time have I used a 10 ft length of electrical conduit to show
how bugle calls can be massacred.
Never tried a mouthpiece, never tried a flared bell.
Either of these additions might make it a way more pleasant listening
experience.

So many new things to try.

Hard-drawn 3/4 " copper water line works too.

At 12:39 PM -0500 4/7/10, Bill Nettles wrote:

A fun exercise is to get a brass mouthpiece and some straight tubing
on the order of a meter and try to play it. Then fashion a bell (or
use a medium sized funnel) on the end and play again. Check the ease
of playing and the overtone structure of each setup and compare.
It's amazing what the flared bell does.



------------------------------

Message: 8
Date: Wed, 7 Apr 2010 12:29:00 -0700 (PDT)
From: curtis osterhoudt <flutzpah@yahoo.com>
Subject: Re: [Phys-l] musical instruments
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Message-ID: <975266.36315.qm@web65616.mail.ac4.yahoo.com>
Content-Type: text/plain; charset=us-ascii

Perhaps not what John was talking about, but entertaining nonetheless:

http://www.youtube.com/watch?v=hIdEeGX2sqQ



/**************************************
As a species, we are forever sticking our fingers into the electric socket of the Universe to see what'll happen next. It's a trait that'll either save us or kill us, but by god it's what makes us human beings. I'd rather be in the company of people who look at Mars than people who contemplate humanity's navel -- other worlds are better than fluff. ~~Sir Terence David John Pratchett
***************************************/




________________________________
From: John Clement <clement@hal-pc.org>
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Sent: Wed, April 7, 2010 1:21:15 PM
Subject: Re: [Phys-l] musical instruments

But of course superb players can play on anything. Dennis Brain played a
Mozart concerto on a green garden hose. He used a mouthpiece, but I don't
recall whether he had an improvised bell. There may be a picture of him
doing it! He even trilled at the end.

John M. Clement
Houston, TX


Many a-time have I used a 10 ft length of electrical conduit to show
how bugle calls can be massacred.
Never tried a mouthpiece, never tried a flared bell.
Either of these additions might make it a way more pleasant listening
experience.

So many new things to try.

Hard-drawn 3/4 " copper water line works too.

At 12:39 PM -0500 4/7/10, Bill Nettles wrote:

A fun exercise is to get a brass mouthpiece and some straight tubing
on the order of a meter and try to play it. Then fashion a bell (or
use a medium sized funnel) on the end and play again. Check the ease
of playing and the overtone structure of each setup and compare.
It's amazing what the flared bell does.

_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l





------------------------------

Message: 9
Date: Wed, 7 Apr 2010 14:35:26 -0500
From: Bill Nettles <bnettles@uu.edu>
Subject: Re: [Phys-l] musical instruments
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Message-ID: <1C09EC0F89D13543BECD14FBACC5344701617CA36E@exmbox.uu.edu>
Content-Type: text/plain; charset="us-ascii"

All of this reminds me of the PDQ Bach Concerto for Tromboon. The tromboon was an instrument which looked like a trombone but had a bassoon bocal and double reed attached where the normal mouthpiece would fit. Absolutely horrid timbre.

-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-bounces@carnot.physics.buffalo.edu] On Behalf Of John Clement
Sent: Wednesday, April 07, 2010 2:21 PM
To: 'Forum for Physics Educators'
Subject: Re: [Phys-l] musical instruments

But of course superb players can play on anything. Dennis Brain played a
Mozart concerto on a green garden hose. He used a mouthpiece, but I don't
recall whether he had an improvised bell. There may be a picture of him
doing it! He even trilled at the end.

John M. Clement
Houston, TX


Many a-time have I used a 10 ft length of electrical conduit to show
how bugle calls can be massacred.
Never tried a mouthpiece, never tried a flared bell.
Either of these additions might make it a way more pleasant listening
experience.

So many new things to try.

Hard-drawn 3/4 " copper water line works too.

At 12:39 PM -0500 4/7/10, Bill Nettles wrote:

A fun exercise is to get a brass mouthpiece and some straight tubing
on the order of a meter and try to play it. Then fashion a bell (or
use a medium sized funnel) on the end and play again. Check the ease
of playing and the overtone structure of each setup and compare.
It's amazing what the flared bell does.

_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l


------------------------------

Message: 10
Date: Wed, 7 Apr 2010 14:06:30 -0700
From: Bernard Cleyet <bernardcleyet@redshift.com>
Subject: Re: [Phys-l] musical instruments
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Cc: Nancy Seese <nancyseese@redshift.com>, "T.K.Wang & Mary Brooks"
<tkmary@dslextreme.com>
Message-ID: <97E13DC2-0B93-47AD-A3AE-7EA8FFE8C617@redshift.com>
Content-Type: text/plain; charset=us-ascii


I've seen this done -- the flare I think was a funnel.


http://web.gc.cuny.edu/sciart/festival/detail/brass.html

And for what is that right hand?

http://vmsstreamer1.fnal.gov/VMS_Site_03/Lectures/Colloquium/041006Holmes/vf002.htm

Somewhere in URL land there is his lecture in which he makes a brass instrument w/ several meters of tubing, etc.

bc recorded much of it at a recent NCNAAPT section meeting. (at San Mateo HS)

Brian Holmes and B. Jones are (is?) the same person.

http://phyz.smugmug.com/gallery/1396101#67063433_TwKar



On 2010, Apr 07, , at 10:39, Bill Nettles wrote:


A fun exercise is to get a brass mouthpiece and some straight tubing on the order of a meter and try to play it. Then fashion a bell (or use a medium sized funnel) on the end and play again. Check the ease of playing and the overtone structure of each setup and compare. It's amazing what the flared bell does.


After reading JC's below I found my DVD. Brian uses a green garden hose, a red plastic funnel and one of his mouth pieces.

bc

He has charts showing the frequencies w/ and w/o bells, mouth pieces, lead pipes, etc. and demonstrates. The bell is a high pass filter.
---------------
Showing off his humorous style, Brain performed a Leopold Mozart horn concerto on rubber hose pipes at a Gerard Hoffnung music festival in 1956, trimming the hose to length with garden shears to achieve the correct tuning.

http://en.wikipedia.org/wiki/Dennis_Brain







On 2010, Apr 07, , at 12:21, John Clement wrote:

But of course superb players can play on anything. Dennis Brain played a
Mozart concerto on a green garden hose. He used a mouthpiece, but I don't
recall whether he had an improvised bell. There may be a picture of him
doing it! He even trilled at the end.

John M. Clement
Houston, TX



------------------------------

Message: 11
Date: Wed, 7 Apr 2010 17:20:56 -0500
From: "John Clement" <clement@hal-pc.org>
Subject: Re: [Phys-l] musical instruments
To: "'Forum for Physics Educators'"
<phys-l@carnot.physics.buffalo.edu>
Message-ID: <38209493424945F78CD30259973F00F0@ClementPC>
Content-Type: text/plain; charset="us-ascii"

The episode I am thinking of is the First Hoffnung Festival which was
recorded in mono and released on LP, but no video. There are probably some
stills of the concert. And yes the YouTube video certainly gives some
insight as it shows funnels, and presumably the hoses had been cut to
correct lengths as they seem a bit short.

John M. Clement
Houston, TX


Perhaps not what John was talking about, but entertaining nonetheless:

http://www.youtube.com/watch?v=hIdEeGX2sqQ



/**************************************
As a species, we are forever sticking our fingers into the electric socket
of the Universe to see what'll happen next. It's a trait that'll either
save us or kill us, but by god it's what makes us human beings. I'd rather
be in the company of people who look at Mars than people who contemplate
humanity's navel -- other worlds are better than fluff. ~~Sir Terence
David John Pratchett
***************************************/




________________________________
From: John Clement <clement@hal-pc.org>
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Sent: Wed, April 7, 2010 1:21:15 PM
Subject: Re: [Phys-l] musical instruments

But of course superb players can play on anything. Dennis Brain played a
Mozart concerto on a green garden hose. He used a mouthpiece, but I don't
recall whether he had an improvised bell. There may be a picture of him
doing it! He even trilled at the end.

John M. Clement
Houston, TX


Many a-time have I used a 10 ft length of electrical conduit to show
how bugle calls can be massacred.
Never tried a mouthpiece, never tried a flared bell.
Either of these additions might make it a way more pleasant listening
experience.

So many new things to try.

Hard-drawn 3/4 " copper water line works too.

At 12:39 PM -0500 4/7/10, Bill Nettles wrote:

A fun exercise is to get a brass mouthpiece and some straight tubing
on the order of a meter and try to play it. Then fashion a bell (or
use a medium sized funnel) on the end and play again. Check the ease
of playing and the overtone structure of each setup and compare.
It's amazing what the flared bell does.

_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l




_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l



------------------------------

Message: 12
Date: Wed, 7 Apr 2010 15:39:15 -0700
From: Bernard Cleyet <bernardcleyet@redshift.com>
Subject: Re: [Phys-l] musical instruments
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Message-ID: <C55D0312-0142-4ECB-A047-B88D390B1427@redshift.com>
Content-Type: text/plain; charset=us-ascii

I've seen this done -- the flare I think was a funnel.


http://web.gc.cuny.edu/sciart/festival/detail/brass.html

And for what is that right hand?

http://vmsstreamer1.fnal.gov/VMS_Site_03/Lectures/Colloquium/041006Holmes/vf002.htm

Somewhere there is his lecture in which he makes a brass instrument w/ sevel meters of tubing, etc.

bc recorded much of it at a recent NCNAAPT section meeting. (at San Mateo HD)

Brian Holmes and B. Jones are (is?) the same person.

http://phyz.smugmug.com/gallery/1396101#67063433_TwKar



On 2010, Apr 07, , at 10:39, Bill Nettles wrote:


A fun exercise is to get a brass mouthpiece and some straight tubing on the order of a meter and try to play it. Then fashion a bell (or use a medium sized funnel) on the end and play again. Check the ease of playing and the overtone structure of each setup and compare. It's amazing what the flared bell does.




------------------------------

Message: 13
Date: Wed, 7 Apr 2010 16:24:47 -0700
From: Richard Hake <rrhake@earthlink.net>
Subject: Re: [Phys-l] Multiple Choice Exam Questions #2
To: <phys-l@carnot.physics.buffalo.edu>
Message-ID: <a06240816c7e2bd0d7a15@[192.168.1.118]>
Content-Type: text/plain; charset="us-ascii" ; format="flowed"

Some subscribers to Phys-L might be interested in a post titled "Re:
Multiple Choice Exam Questions" [Hake (2010)]. The abstract reads:

*******************************************
ABSTRACT: Karol Dean of the POD list asked: "Is there any research or
folklore to support the 1 question/minute formula [for
multiple-choice questions] that I've heard?"

To which Ken Bain replied: ". . . . . . multiple-choice questions
that simply require the regurgitation of isolated information, or
worse yet, the ability to recognize correct answers . . . tend to
foster surface or strategic rather than deep approaches to learning.
. . . .THIS DOESN'T MEAN THAT YOU CANNOT DEVELOP MULTIPLE-CHOICE
EXAMINATIONS THAT CAN FOSTER DEEP APPROACHES. Look, for example, at
the way Eric Mazur develops what are basically multiple-choice
questions for his Peer Learning approach. But that approach is
embedded in an environment designed to promote deep considerations."

In this post I:

(a) quote psychmetricians Mark Wilson and Meryl Bertenthal in support
of Bain's claim that "multiple-choice examinations that can foster
deep approaches," and

(b) elaborate on the physics education environment in which Mazur
came to desert the traditional passive student lecture for an
"Interactive Engagement" method.
*******************************************

To access the complete 28 kB post, please click on
<http://groups.yahoo.com/group/Net-Gold/message/32417>.

Richard Hake, Emeritus Professor of Physics, Indiana University
24245 Hatteras Street, Woodland Hills, CA 91367
Honorary Member, Curmudgeon Lodge of Deventer, The Netherlands
President, PEdants for Definitive Academic References (PEDAR)
<rrhake@earthlink.net>
<http://www.physics.indiana.edu/~hake/>
<http://www.physics.indiana.edu/~sdi/>
<http://HakesEdStuff.blogspot.com/>
<http://iub.academia.edu/RichardHake>

"In science education, there is almost nothing of proven efficacy."
Grover Whitehurst, former director, Institute of Education
Sciences, USDE,
as quoted by Sharon Begley (2004)

"Physicists are out in front in measuring how well students learn the
basics, as science educators incorporate hands-on activities in hopes
of making the introductory course a beginning rather than a finale."
Erik Stokstad (2001)

REFERENCES [Tiny URL's courtesy <http://tinyurl.com/create.php>.]
Hake, R.R. 2010. "Re: Multiple Choice Exam Questions #2," online on
the OPEN! Net-Gold archives at
<http://groups.yahoo.com/group/Net-Gold/message/32417>. Post of 6
April 2010 17:57:00-0700 to AERA-L and Net-Gold. The abstract and
link to the complete post are being distributed to various discussion
lists and are also online at
<http://hakesedstuff.blogspot.com/2010/04/re-multiple-choice-exam-questions-2.html>
with a provision for comments.

------------------------------

Message: 14
Date: Wed, 7 Apr 2010 16:30:04 -0700
From: Robert Yeend <ryeend@sbcglobal.net>
Subject: Re: [Phys-l] musical instruments
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Message-ID: <32F68FC1-A66A-4F57-8EA2-A423F3FA6A52@sbcglobal.net>
Content-Type: text/plain; charset=WINDOWS-1252; delsp=yes;
format=flowed

The University of Wisconsin, Madison, has produced a series of
science videos for the general public, called Science Bag Videos.
They include subjects in Biology, Chemistry, Geology, and PHYSICS and
are FREE for downloading from the following site:

http://www4.uwm.edu/letsci/sciencebag/videos/

One that I have used is

"The Clarinet, The Washtub, The Musical Nails: How Musical
Instruments Work" by Robert Greenler

The video is true to the advertising: "This is no ordinary music
lesson. The familiar out of the unfamiliar..."weird and wonderful
things"...a magician pulling sounds out of the air...a heightened
sense of physical principles and possibilities?all of these, and more
are at play in "The Clarinet, The Washtub, And The Musical Nails: How
Musical Instruments Work." Physicist Robert Greenler uses an eclectic
set of materials and an abundance of spontaneous humor to explore the
basic elements in the creation of music."

It's the only full length video I use in class, and once, when I had
to sub for a band class, I used it with good success. I have a
worksheet to go along with the video, if you'd be interested.

Bob Yeend

Justin-Siena High School
4026 Maher Street
Napa, CA 94558
Ph: 707-255-0950 ext. 527
Fax: 707-255-1334
yeendb@justin-siena.org





------------------------------

Message: 15
Date: Wed, 07 Apr 2010 15:39:15 -0400
From: "David Strasburger-fac" <David_Strasburger@nobles.edu>
Subject: [Phys-l] standing waves in exhaust?
To: phys-l@carnot.physics.buffalo.edu
Message-ID: <fc.000f5733060d5657000f5733060d5657.60d5a69@nobles.edu>
Content-Type: text/plain; charset=ISO-8859-1

I saw a phenomenon Sunday night that I couldn't explain; I'd appreciate
ideas and thoughts from the list.

On Sunday evening the Red Sox played their home opener against the Yankees
in Fenway. The league, in its infinite wisdom, booked the game to be
televised nationally, so instead of being played at the traditional 1pm,
it was played at 8pm.

As a result, the flyover by a pair of figher jets from the Vermont Air
National Guard was all but invisible. As they passed overhead, the most
visible feature was a luminous pink/orange cone extending perhaps one
plane-length from the aft part of each jet. Inside each cone was clearly
visible a set of bright transverse lines (6 or 8, maybe?), evenly spaced
along the length of the cone.

Any suggestions as to what might cause this?

Is it as simple as:
jet ejects wicked hot air --> wicked hot air glows --> standing wave in
exhaust (created by?) means there exist local density highs in the plume
--> higher density glowing air looks brighter than lower density glowing
air

David Strasburger
Noble & Greenough School



------------------------------

Message: 16
Date: Thu, 8 Apr 2010 06:40:36 -0700 (PDT)
From: curtis osterhoudt <flutzpah@yahoo.com>
Subject: Re: [Phys-l] standing waves in exhaust?
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Message-ID: <236472.81600.qm@web65604.mail.ac4.yahoo.com>
Content-Type: text/plain; charset=us-ascii

Those are often termed "shock diamonds"; there's quite a good explanation here: http://www.aerospaceweb.org/question/propulsion/q0224.shtml

/**************************************
As a species, we are forever sticking our fingers into the electric socket of the Universe to see what'll happen next. It's a trait that'll either save us or kill us, but by god it's what makes us human beings. I'd rather be in the company of people who look at Mars than people who contemplate humanity's navel -- other worlds are better than fluff. ~~Sir Terence David John Pratchett
***************************************/




________________________________
From: David Strasburger-fac <David_Strasburger@nobles.edu>
To: phys-l@carnot.physics.buffalo.edu
Sent: Wed, April 7, 2010 1:39:15 PM
Subject: [Phys-l] standing waves in exhaust?

I saw a phenomenon Sunday night that I couldn't explain; I'd appreciate
ideas and thoughts from the list.

On Sunday evening the Red Sox played their home opener against the Yankees
in Fenway. The league, in its infinite wisdom, booked the game to be
televised nationally, so instead of being played at the traditional 1pm,
it was played at 8pm.

As a result, the flyover by a pair of figher jets from the Vermont Air
National Guard was all but invisible. As they passed overhead, the most
visible feature was a luminous pink/orange cone extending perhaps one
plane-length from the aft part of each jet. Inside each cone was clearly
visible a set of bright transverse lines (6 or 8, maybe?), evenly spaced
along the length of the cone.

Any suggestions as to what might cause this?

Is it as simple as:
jet ejects wicked hot air --> wicked hot air glows --> standing wave in
exhaust (created by?) means there exist local density highs in the plume
--> higher density glowing air looks brighter than lower density glowing
air

David Strasburger
Noble & Greenough School

_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l





------------------------------

Message: 17
Date: Thu, 8 Apr 2010 10:03:39 -0400 (EDT)
From: Michael Meyer <mrmeyer@mtu.edu>
Subject: Re: [Phys-l] musical instruments
To: Forum for Physics Educators <phys-l@carnot.physics.buffalo.edu>
Message-ID:
<1033647423.10457241270735419029.JavaMail.root@alcona.merit.edu>
Content-Type: text/plain; charset=utf-8

Bryan -

I'm returning your video tape that you've been so graciously willing to let me keep for so long...per the below (and FYI), the same video is now available online! I did watch about 15 minutes of the beginning, but will still plan to watch the rest with my kids as I can definitely see it would be interesting - especially for Tess.

Thanks for the loan and letting me know about this excellent resource.

Mike
----- Original Message -----
From: "Robert Yeend" <ryeend@sbcglobal.net>
To: "Forum for Physics Educators" <phys-l@carnot.physics.buffalo.edu>
Sent: Wednesday, April 7, 2010 7:30:04 PM GMT -05:00 US/Canada Eastern
Subject: Re: [Phys-l] musical instruments

The University of Wisconsin, Madison, has produced a series of
science videos for the general public, called Science Bag Videos.
They include subjects in Biology, Chemistry, Geology, and PHYSICS and
are FREE for downloading from the following site:

http://www4.uwm.edu/letsci/sciencebag/videos/

One that I have used is

"The Clarinet, The Washtub, The Musical Nails: How Musical
Instruments Work" by Robert Greenler

The video is true to the advertising: "This is no ordinary music
lesson. The familiar out of the unfamiliar..."weird and wonderful
things"...a magician pulling sounds out of the air...a heightened
sense of physical principles and possibilities?all of these, and more
are at play in "The Clarinet, The Washtub, And The Musical Nails: How
Musical Instruments Work." Physicist Robert Greenler uses an eclectic
set of materials and an abundance of spontaneous humor to explore the
basic elements in the creation of music."

It's the only full length video I use in class, and once, when I had
to sub for a band class, I used it with good success. I have a
worksheet to go along with the video, if you'd be interested.

Bob Yeend

Justin-Siena High School
4026 Maher Street
Napa, CA 94558
Ph: 707-255-0950 ext. 527
Fax: 707-255-1334
yeendb@justin-siena.org



_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l

--
Michael R. Meyer
Lecturer/Lab Coordinator
Mich Tech Physics Dept.
mrmeyer@mtu.edu
906-487-2273


------------------------------

_______________________________________________
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 63, Issue 6
*************************************