[TheForge] Re: Triangles

[Don Snitgen]

Now that we're into the physics of it, and with regard to empirical testing,
why does a metal hanger (things I've tried: steel S hooks, single strand of
twisted copper electrical wire with clear plastic insulation, twisted
picture hanging wire, etc.) dull the sound (my original question) and string
(including things I've tried: boot laces, leather laces, 550 cord, etc.)
enhance the sound?
I haven't tried the guitar string idea yet.  I'm going down to the local
bait shop and look at the fishing line they use to catch Lake Trout out on
Superior.
The ideal material would last a long time without breaking down in the sun,
be strong enough to hold the weight of the triangle with someone beating on
it, and allow the full range of sound frequencies and loudness possible.
As I mentioned in another note, I finally got around to actually measuring
mine.  I was surprised to discover it was bigger than I had estimated with
14" on a side and 7/8" in diameter.
When it's working it's extremely loud and demands ear plugs when I want to
beat out a prolonged fire alarm concert.
I haven't done a spark test on the steel, nor did I temper it.  I probably
won't mess with it since it rings nice now, and the steel stake came from an
old iron mine site so is one of a kind.
Don Snitgen
-- 
Deer Creek Forge
Shelter Bay, Michigan
http://personalpages.tds.net/~dsnitgen/
> From: Andy Vida <osan at netlabs.net>
> Organization: Proof Technologies
> Reply-To: Sponsored by ABANA <theforge at mailman.qth.net>
> Date: Tue, 14 Sep 2004 22:53:26 -0700
> To: Sponsored by ABANA <theforge at mailman.qth.net>
> Subject: Re: [TheForge] Re: Triangles
> 
> 
> 
> Schade wrote:
>> 
>> On Sep 14, 2004, at 12:46 PM, Charle B Vincent wrote:
>> 
>>> Didn't we have a mojor debate on this some montsh back, where all
>>> sorts of theories were presented before someone actually went out in
>>> the shop and did the  empirical thing finally?
>>> 
>>> Charles
>>> _
>> _
>> 
>> The empirical thing is fine but no one has explained why a higher
>> carbon or heat treated triangle would be louder.
> 
> Well, I'll take a stab at it by saying that within
> limits, higher rigidity reduces dampening effects.
> Materials such as lead have a high tendency to dampen
> vibration, which is one of the reasons it is used in
> dead blow hammers.  The low elasticity of the material
> very effectively dampens the blow such that the energy
> dissipates into the work.  With higher rigidity comes
> (usually) higher elasticity, which dissipates energy
> in the body of bell a lot less, leaving more to dissipate
> into the air, which produces more sound.
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