The Hornster: World’s loudest bicycle bell is noisier than Concorde

May 3, 2012

Bicycle fitted with a train air horn||||

City cyclists who battle to get themselves noticed on the roads can now resort to the ultimate deterrent against inattentive truck drivers; a bicycle equipped with a horn that is louder than Concorde.

At close quarters the Hornster bicycle emits a level of sound so powerful that, if used in anger, it could deafen any motorist who veered too close.

The Hornster


The Hornster bicycle was developed by the Environmental Transport Association (ETA) to highlight the dangers that cyclists face on city roads. Trucks are involved in over half of cyclist fatalities that occur in London.

The triple air horn fitted to the bicycle is an Airchime KH3A from an American locomotive, which has been adapted to run off a scuba diving cylinder.

Watch the Hornster on Youtube


The Hornster is so powerful that at a distance of 100ft it is far louder than a standard truck horn and more than noisy enough for a cyclist to make themselves heard above the din of the urban jungle.

The ETA has previously built the flamethrower-equipped BOND bike and the world’s smallest caravan ( QTvan ).

A spokesperson for the ETA said: “The same quietness that makes bicycles such a civilised way of getting around makes them vulnerable to inattentive motorists – the Hornster is a wake-up call for drivers who don’t pay attention to bikes.”

How loud?

  • Hornster: 178db (3ft) 140db (50ft)
  • F-14 take off with re-heat: 130db (50ft)
  • Concorde (landing):119db
  • Typical lorry air horn: 110db (100ft)
  • City traffic: 78db (central London)
  • Conversation in restaurant: 60db

The Hornster

The Hornster

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