Noise dissipation formula at

Go Back   DV Info Net > The Tools of DV and HD Production > All Things Audio

All Things Audio
Everything Audio, from acquisition to postproduction.

Thread Tools Search this Thread
Old August 3rd, 2007, 01:24 PM   #1
Join Date: Feb 2004
Location: Brookline, MA
Posts: 1,447
Noise dissipation formula

Is it possible to extrapolate the loudness in dB (A or C) of a source at some distance given its loudness nearby?
Emre Safak is offline   Reply With Quote
Old August 3rd, 2007, 03:02 PM   #2
Inner Circle
Join Date: May 2006
Location: Camas, WA, USA
Posts: 5,513
As I recall, sound drops off at the cube of the distance. It's the cube, because the sound waves spread out in three dimensions.

So, if you double the distance, the sound will fall off by a factor of eight (2^3), which is 9 dB (or is it 18 dB? I always get confused between power and amplitude.)
Jon Fairhurst
Jon Fairhurst is offline   Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

(800) 223-2500
New York, NY

B&H Photo Video
(866) 521-7381
New York, NY

Texas Media Systems
(512) 440-1400
Austin, TX

Precision Camera
(800) 677-1023
Austin, TX

(800) 323-2325
Mineola, NY

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > The Tools of DV and HD Production > All Things Audio

Thread Tools Search this Thread
Search this Thread:

Advanced Search



All times are GMT -6. The time now is 02:08 AM.

DV Info Net -- Real Names, Real People, Real Info!
1998-2018 The Digital Video Information Network