The pitch of a Blackhole

Jimmy Douglas · Post by **Jimmy Douglas** » 3 Sep 2010 4:15 pm

I saw on this program

http://www.abc.net.au/tv/guide/abc1/201 ... %26%20Song

That the pitch of a black hole is Bb.... 57 octaves below what we can hear.

I think I will put that change on a lever next time!

Jimmy

Joachim Kettner · Post by **Joachim Kettner** » 4 Sep 2010 11:28 am

I wonder how thick the diameter of a string has to be to make such a low sound

Dan Galysh · Post by **Dan Galysh** » 4 Sep 2010 3:38 pm

To quote a favorite Vulcan of mine, "Fascinating..."

Ray Minich · Post by **Ray Minich** » 4 Sep 2010 4:17 pm

I always wondered what the natural frequency of an aircraft carrier mooring cable might be...

Jimmy Douglas · Post by **Jimmy Douglas** » 4 Sep 2010 5:36 pm

Joachim, I think Ray is on to something. I was pondering suspension bridge cable. That would be in the light guage set I suppose.

Dan I imagine that particular hum would probably be an audible part at any active Vulcan gig. That hum would be hard to control at the amp. Hum from single coils would possibly have something to do with it. Imagine the humbucking pickup required there.

David Mason · Post by **David Mason** » 5 Sep 2010 2:27 am

I'm pretty sure I read somewhere that the resonant frequency of the Planet Earth is a Bb, too... uh-oh...

So is the garbage compactor... double super uh-oh...

My "C6th" pedal steel is tuned to Bb... triple super-duper uh-oh...

http://www.lunarplanner.com/Harmonics/p ... onics.html

(they're coming, i'm just not sure when...)

Jimmy Douglas · Post by **Jimmy Douglas** » 5 Sep 2010 2:32 am

Great link David, I am going to go and get my aluminum hat on now.

Richard Sevigny · Post by **Richard Sevigny** » 5 Sep 2010 6:17 am

Good thing it's Bb... if a Black Hole were a semitone lower we'd have to call it an A-hole

David Griffin · Post by **David Griffin** » 5 Sep 2010 9:17 am

Jr. Knights' motto is: "Bflat is where it's at".

Dave Hopping · Post by **Dave Hopping** » 5 Sep 2010 11:35 am

Jimmy Douglas wrote:I saw on this program

http://www.abc.net.au/tv/guide/abc1/201 ... %26%20Song

That the pitch of a black hole is Bb.... 57 octaves below what we can hear.

I think I will put that change on a lever next time!

Jimmy

So how many cycles per second(hour?) would that be?

Michael Barone · Post by **Michael Barone** » 5 Sep 2010 4:21 pm

I didn't see the show, but I calculated 6 cycles per 1,000,000,000 years.

Jimmy Douglas · Post by **Jimmy Douglas** » 5 Sep 2010 5:19 pm

Dave, Beats me. I cant work out anything with my aluminium hat on. Michael, I believe you. Richard, that is very funny.

Jimmy

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The pitch of a Blackhole

The pitch of a Blackhole

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