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Re: Digest Number 1114

Subject: Re: Digest Number 1114
From: Brian McWilliams <>
Date: Fri, 19 Sep 2003 11:01:11 -0700 (PDT)
I heard this story too - but I think they converted
numerical data into sound as an experiment to play
with the period of the pulse. I may be wrong, but
without a medium to travel in (air), I don't think
sound, as audio that you can hear, can travel through


> We don't usually think of an orbiting X-ray
> telescope as an instrument for detecting natural
> sound, but it can happen. The lead article in the
> latest (13 Sep 2003) issue of Science News (see
> reports that astronomers at the
> University of Cambridge in England, using
> observations made by the orbiting Chandra X-ray
> telescope, have detected sounds being emitted by a
> black hole. This sound is described as a B-flat
> which is 57 octaves below middle C. Furthermore the
> sound is loud -- equivalent to the energy of
> 100,000,000 supernova explosions!

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