Linked by Thom Holwerda on Wed 25th Aug 2010 22:19 UTC
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Member since:
2005-07-06
http://forums.winamp.com/showthread.php?threadid=242059
Most popular air raid and warning sirens today produce a sound level of 127 dB at 100 feet and provide a typical one-mile radius coverage area. At 138 dB the Chrysler Air Raid Siren is approximately two times as loud and will provide a two and one-half mile radius coverage area with the same sound level at the distant edge. The most powerful siren available for purchase today (American Signal's Tempestâ„¢ T-135-ACâ„¢) produces a sound level of 135 dB at 100 feet. The 3dB higher output of the Chrysler Air Raid Siren, at 138 dB, represents twice as much sound energy output.