The Loud Bicycle horn at the Waterworks Museum

I volunteer at the Waterworks Museum and one day I decided to roll my bike into the grand engine hall and give the horn a test. This is what it sounded like.

LoudBicycle at the Waterworks from LoudBicycle on Vimeo.

Note that this is an earlier prototype which has a relatively low pitch. The final design features a higher pitched horn with the same loudness but it is smaller and with better battery life.