RF Cafe Software
About RF Cafe
1996 - 2016
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...
All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.
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dB re 10−12 W
|Rocket engine||1,000,000 W||180 dB|
|Turbojet engine||10,000 W||160 dB|
|Siren||1,000 W||150 dB|
|Heavy truck engine or
loudspeaker rock concert
|100 W||140 dB|
|Machine gun||10 W||130 dB|
|Jackhammer||1 W||120 dB|
|Excavator, trumpet||0.3 W||115 dB|
|Chain saw||0.1 W||110 dB|
|Helicopter||0.01 W||100 dB|
|Loud speech, vivid children||0.001 W||90 dB|
|Usual talking, Typewriter||10−5 W||70 dB|
|Refrigerator||10−7 W||50 dB|
|(Auditory threshold at 2.8 m)||10-10 W||20 dB|
|(Auditory threshold at 28 cm)||10-12 W||0 dB|