Bell T

I looked up the information dealing with Sheprard's tones and bell
frequencys, and altho I have heard Shepard's tones, whith the timbral
content related to the octaves, if you listen REALLY closely, I noticed that
this "M C Esher Staircase like effect", (Sorry guys, I know of no other was
to describe it) can be heard to "break", --and the sound to me, anyway,
suddenly seemd to ZIP up to the origional frequency.

Mabey its just me….

I dunno….

I recall that I have read information that is is impossible to determine the
shape of a fractal drum, at least by analyseing spectral content of its wave
when struck,---and in the depths of my memory, I recall there was something
really uncanny about the acoustical physics of bells.

In m earlier days as a teenager, I used to read mechanical engineering
texts, and I saw such wounderous thigs as Young's modulus, stress-strain
ratios, elasticity, plasticity, viscosity, thixotropy and so forth.

But I wounder if there is an actual "semantic system" and NAME IN PARTICULAR
given to the disipline/field of science which deals PURELY with the
acoustical properties of materials.

"Sonorosity", "acoustico-mechanics".

Oh, I give up…..

:o)

Assumedly, in fact, almost CERTINLY, I can state intuitively, that slight
variations on the composition of the bell would change its sound
drastically, but what really illudes me is the way, and the nature where by,
we'd take UNIT acoustical propertys, measured from the very simplest of
physical systems, such as "A standard one meter diameter, 1 cm thick
silver/steel/lead/gold/glass/bone gong struck with 10 Newtons of force with
a rubber mallet at 0.3 mters from the center", and then apply this raw
data/information to a physical model of a bell, drum, pipe what have you
without having to labour night and day and build the damn thing!!!!

Can you give em a hint as to what the study migh be named, and links to
where I can veiw the nature of composition of materials
effecting/influlenceing waveforms.

Now if I just add a dash of plutonium to that physical model….

---Sarn.

Sarn wondered:
> But I wounder if there is an actual "semantic system" and
> NAME IN PARTICULAR
> given to the disipline/field of science which deals PURELY with the
> acoustical properties of materials.
>
> "Sonorosity", "acoustico-mechanics".
>
> Oh, I give up�..
>

Well, I vote "idiophonics," being the study of idiophones, being any object
that has a sound based entirely on its shape and construction that is
usually suspended and struck.
I got idiophones from an alternate instrument clasification system that
includes chordophones, membranophones, and aerophones.
Just an idea.

Todd