[Trombone-l] Acoustics of brass instruments

[Chris Tune]

That is Psycho-Acoustics.  A related item for sure.  I think it is very good 
to attempt to hear harmonics and so on.  And I know that the actual size of 
the horn, the shape of the horn's various parts (e.g. the bell, the 
materials. . .shape of the bows) can affect the harmonic content.   I'm 
pretty sure there is a very different structure to my .509 bore Bach 16 and 
my .500 bore Conn 6H.  I'll have to record some simple material and look 
carefully at the spectra on a recording.

Chris
----- Original Message ----- 
From: "Richardson, Timothy Mr. DAC USAG Franconia DPW" 
<timothy.a.richardson at us.army.mil>
To: <TROMBONE-L at server5.SAMFORD.EDU>
Sent: Monday, June 05, 2006 5:21 AM
Subject: Re: [Trombone-l] Acoustics of brass instruments


> I'm not sure this is anti-technology.  This is experiment, measurement and
> data collection.  The data is qualitative (we hear the 5th but don't 
> assign
> a number to how much) but that doesn't change the process.  The ears ARE
> laboratory instruments.
>
> But that aside, there is a potential trap here that's not easy to avoid 
> (not
> just for the case of hearing harmonics but for similar cases as well.)
>
> It is this:  Through this type of effort it is possible to learn to hear
> sounds that ARE there.
>
> And, unfortunately, it is possible to learn to hear sounds that are NOT
> there.  And it can be difficult to tell the difference.  Sometimes
> impossible.
>
>
>
> -----Original Message-----
> From: sabutin [mailto:sabutin at mindspring.com]
>
> <snip>
>
> Can't hear 'em? You've been too well trained by society. They're up there.
>
> Two ways to predict them so that you CAN hear them, and one way to test 
> for
> them.
>
> #1-Just play them on a keyboard instrument. You KNOW what hey are, right?
> Same proportions as the overtone series above pedal Bb.
> Octave, P5th, P4th, Maj 3rd, min 3rd, funny min 3rd, funny Maj 2nd, maj 
> 2nd,
> etc. on up.
>
> The easiest ones to hear and isolate are usually the 5th, 6th and 7th
> partials. That is, the 2 octaves plus a Maj. 3rd, P 5th and min 7th above
> the note being played. Play them on a piano, get them in your ear, and 
> then
> try to hear and isolate them above whatever note you are playing.
>
> #2-Learn to isolate them with your voice. This is the best way, because it
> is physical and organic. You FEEL them.
>
> <snip>
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