The exact acoustic shape of the skies above Los Angeles

[Image: Photo by John Gay: an F/A-18 creates a condensation cone as it breaks the speed of sound].

An email was sent out last week from the Regional Public & Private Infrastructure Collaboration Systems (RPPICS) – an organization with no web presence – warning many businesses in and around Los Angeles that city residents "could hear up to a dozen sonic booms this morning [June 11] as some NASA F/A-18 aircraft fly at supersonic speeds around Edwards Air Force Base."
While the "loudness of the booms will vary," we read, these are only "preliminary calibration flights for an upcoming NASA study" that will research how "to reduce the intensity of sonic booms." Part of this will be studying "local atmospheric conditions," including air pressure, wind speed, and humidity, as these all entail acoustic side-effects.
It's a sonic cartography of the lower atmosphere: an echo-location exercise. The geometry of noise.
Sound-bombing L.A. from above in order to know the exact acoustic shape and structure of the sky.

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4 Comments:

Blogger timquinn said...

Is that a DIller and Scofidio fighter jet?

June 15, 2009 7:15 PM  
Blogger Geoff Manaugh said...

Exactly - their new line of mobile atmospheric building effects...

June 16, 2009 5:17 AM  
Blogger modefier said...

that pic also in sanford kwinter's most recent book, i think probably a stock photo. do we have to credit the daily mail, which is a disgusting rag?

June 17, 2009 12:37 AM  
Anonymous Anonymous said...

when you say "an email was sent", i presume it was sent to people who requested it? or was it simply spam?

June 17, 2009 8:19 AM  

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