DB drag racing

DB drag racing

dB drag racing is a competition rewarding the person who can produce the loudest sound inside a vehicle. The "dB" means decibels of sound pressure level (SPL). In these competitions, SPL (Sound Pressure Level) of 155 dB can be reached, and it is not unheard of to see 160+ dB as well.

Competitive vehicles can range from a small vehicle with a single amplifier and subwoofer up to a large van with dozens of amplifier and subwoofer powered by dozens of car batteries and with upgraded electrical wiring and alternators.

There were 10,000 competitors in 2003 and 300 "races". U.S. National Championships were held in Tennessee.

During a competition, the vehicle must be driven 20 feet. Nobody is allowed to sit in the vehicle during trials because injury would be certain. The vehicles are sealed tight to maximize containment of the sound energy for the decibel level meter. The competitor stands away from the vehicle with an on/off switch control while a computer voice announces the stages for the "races". The test tone consists of a very short resonating tone between 30 Hz and 70 Hz, called "the burp".

The current loudest car has been recorded at 180.5 dB.Fact|date=September 2007 For comparison:
*183 dB -- Blue whale humming at 1 mFact|date=April 2008
*163 dB -- Windows breakFact|date=April 2008
*150 dB -- Jet engine at 30 mFact|date=April 2008
*130 dB -- Threshold of pain; train horn at 10 mFact|date=April 2008

The perceived psychoacoustical loudness should double with every 10 dB increase, so 178.9 dB is more than 32 times as loud as a rock concert (nearly 2^6 = 64), and nearly 8 times as loud as a jet engine at 30 m. [cite web|last=Wolfe|first=Joe|title=What is a decibel?|publisher=School of Physics,University of New South Wales|date=2006-09-15|url=http://www.phys.unsw.edu.au/jw/dB.html|accessdate=2007-10-04]

Direct comparisons, however, can only be made with the same measurement techniques, and the same weighting scale.

Sources

* [http://www.dbdrag.com/ Official DB Drag Racing Website]
*"This American Life" radio broadcast 2004-12-11 ( [http://audio.wbez.org/tal/279.m3u "Auto Show"] ).
* [http://www.termpro.com/dbdrag/ Extreme SPL Racing]
* [http://www.cnn.com/2003/TECH/ptech/07/02/popsci.stereo.kill/ CNN report]


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Drag racing — Drag racer and Drag race redirect here. For other uses, see Drag racing (disambiguation). The Christmas tree counting down at SIR. Note the blinder, to prevent the driver from being distracted by the light for the other lane. Drag racing is a… …   Wikipedia

  • Drag racing (disambiguation) — Drag racing is a motor racing competition. Drag Racer or Drag Race may also refer to: Drag Racer (song), a 1976 instrumental song by the Doug Wood Band Drag Racer (game), a 2003 flash game developed by Phantom Games Drag Race (album), a remix… …   Wikipedia

  • Drag-Racing — Drag|ra|cing, Drag Ra|cing [ dræg rɛɪsɪŋ], das; [s], s [engl. drag racing]: Motorsport, bei dem Dragraces gefahren werden. * * * Drag|ra|cing, (auch:) Drag Ra|cing [ dræg rɛɪsɪŋ], das; [s], [engl. drag racing]: Motorsport, bei dem Dragraces… …   Universal-Lexikon

  • drag racing — drag race ► NOUN ▪ a short race between two cars as a test of acceleration. DERIVATIVES drag racer noun drag racing noun …   English terms dictionary

  • drag-racing — dragˈ racing noun • • • Main Entry: ↑drag …   Useful english dictionary

  • Drag-Racing — Burn out eines Top Fuel Dragsters am Hockenheimring Beschleunigungsrennen oder Dragsterrennen (Drag Racing) sind Motorsportveranstaltungen, bei denen eine gerade Strecke bei stehendem Start schnellstmöglich zurückzulegen ist. Die traditionellen… …   Deutsch Wikipedia

  • Drag-racing — Burn out eines Top Fuel Dragsters am Hockenheimring Beschleunigungsrennen oder Dragsterrennen (Drag Racing) sind Motorsportveranstaltungen, bei denen eine gerade Strecke bei stehendem Start schnellstmöglich zurückzulegen ist. Die traditionellen… …   Deutsch Wikipedia

  • Drag Racing — Burn out eines Top Fuel Dragsters am Hockenheimring Beschleunigungsrennen oder Dragsterrennen (Drag Racing) sind Motorsportveranstaltungen, bei denen eine gerade Strecke bei stehendem Start schnellstmöglich zurückzulegen ist. Die traditionellen… …   Deutsch Wikipedia

  • drag racing — noun Etymology: drag (I) : the sport of holding acceleration contests for vehicles over a straight course * * * drag racing noun [uncountable] Thesaurus: racing with cars and other vehicleshyponym sports events and competition …   Useful english dictionary

  • drag racing — See dragracer. * * * Form of motor racing in which two contestants race side by side from a standing start over a straight quarter mile strip of pavement. Winners go on to compete against others in their class until only one is left undefeated.… …   Universalium

  • drag\ racing — amusing canine pass time whereby a seated dog scoots himself across the carpet with a guilty, knowing look on his face. No, the beige carpet wasn t striped until Snot discovered drag racing! …   Dictionary of american slang

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”