(meteorobs) Multiple sonic booms

[mark ford]

Hi,

Multiple rocks can cause separate sonic booms, but also a single object
can cause multiple booms if it is spinning or irregular in shape as it
enters the lower atmosphere. 

Here is a recording of the Bovedy Meteorite breaking up over Ireland

Which fell 25th April 1969 at 9:22pm (it is an L3 chondrite).

http://fernlea.tripod.com/bovedy.wav


Best

Mark Ford
BIMS



-----Original Message-----
From: Ed Majden [mailto:epmajden at shaw.ca] 
Sent: Saturday, March 19, 2005 11:17 PM
To: Global Meteor Observing Forum
Subject: Re: (meteorobs) Multiple sonic booms

on 3/19/05 14:43, GeoZay at aol.com at GeoZay at aol.com wrote:

> 
> Ed>>A sonic
> boom is created by the leading edge and the trailing  edge of a single
> object.<<
> 
> 
> I wonder how the sonics would sound like, if the object was smaller
than  a
> plane or space shuttle...such as something the size of a basketball?
Would the
> leading edge and trailing edge be too close to be able to distinguish
> separate  booming? I think of a high power rifle bullet heard off in a
> distance, 
> outside  of the echos, it seems I only hear one boom (or pow in this
case. :O)
> Or 
> the  cracking of a whip...also a mini-boom to breaking the sound
barrier.
> GeoZay
> 

George:
    The object would have to be large enough so there is a measurable
time
delay between the leading edge and trailing edge boom, otherwise you
would
hear the two blended together and thus a single boom.  That's my guess
anyway!  
Ed

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