OT: Black Hole Bass Note

[Richard Brekne]

Gee... I wonder what kind of an inharmonicity curve it generates !! :)

Thanks John... neat

RicB

John Musselwhite wrote:

> Hi Folks...
>
> I ran across this on the NASA mailing list, and while it doesn't really
> have anything to do with pianos, it mentions them. The entire news release
> should be found at http://chandra.nasa.gov but here is an excerpt:
>
> "RELEASE: 03-284
>
> CHANDRA "HEARS" A BLACK HOLE
>
>       NASA's Chandra X-ray Observatory detected sound waves,
> for the first time, from a super-massive black hole. The
> "note" is the deepest ever detected from an object in the
> universe. The tremendous amounts of energy carried by these
> sound waves may solve a longstanding problem in
> astrophysics.
> [...]
> "We have observed the prodigious amounts of light and heat
> created by black holes, now we have detected the sound,"
> said Andrew Fabian of the Institute of Astronomy (IoA) in
> Cambridge, England, and leader of the study.
>
> In musical terms, the pitch of the sound generated by the
> black hole translates into the note of B flat. But, a human
> would have no chance of hearing this cosmic performance,
> because the note is 57 octaves lower than middle-C (by
> comparison a typical piano contains only about seven
> octaves). At a frequency over a million, billion times
> deeper than the limits of human hearing, this is the deepest
> note ever detected from an object in the universe."
> --------------------------------
>
> And apropos from another list... "The universe is full of amazing things,
> waiting patiently for our wits to grow sharper."
>
>                         John
>
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--
Richard Brekne
RPT, N.P.T.F.
UiB, Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html
http://www.hf.uib.no/grieg/personer/cv_RB.html