black hole pitch

Hi Chad!
Well 20% accuracy is an awful big margin! Thats 40% if you look at
plus and minus 20%.
I was hoping it might be closer to the Schuman resonance.

Here's Andy Fabian (the main scientist involved)reply to my inquiry
regarding the pitch.

Cheers,
Chad

Date: Wed, 10 Sep 2003 21:50:58 +0100 (BST)

Hi

It was worked out from the frequency, which is about one cycle per 10
million yr (to an accuracy of about 20%). If you agree that an octave is

a factor of two, then 57 octaves above this frequency we get to about
479
Hz or c/s, which is about B flat (A is 440Hz). You might tell me that
479
is closer to a note in another system, perhaps!? (I've briefly looked
at web-sites which suggest this is possible.) But given the uncertainty
I don't think it makes a difference for the present purpose which is an
attempt to illustrate this note in words.

We actually work out the pitch of the note we see from the wavelength
(measured as the separation of the ripples in the X-ray image) and the
speed of sound in the gas (measured from the temperature which we get
from
the spectrum or 'colour' of the X-rays).

I hope that's intelligible and thanks for your interest.

yours
Andy Fabian
-- -Kraig Grady
North American Embassy of Anaphoria Island
http://www.anaphoria.com
The Wandering Medicine Show
KXLU 88.9 FM WED 8-9PM PST

--- In metatuning@yahoogroups.com, kraig grady <kraiggrady@a...>
wrote:

> <snip>
>
> Here's Andy Fabian (the main scientist involved)reply to my inquiry
> regarding the pitch.
>
> Cheers,
> Chad
>
> Date: Wed, 10 Sep 2003 21:50:58 +0100 (BST)
>
> Hi
>
> It was worked out from the frequency, which is about
> one cycle per 10 million yr (to an accuracy of about 20%).
> If you agree that an octave is a factor of two, then
> 57 octaves above this frequency we get to about 479 Hz
> or c/s, which is about B flat (A is 440Hz).
>
> <snip>

well, OK, then that makes the frequency approximately

479 / 2^(57) = 3.32373 * 10^-15 Hz

-monz